diff --git a/extensions/radxa-aic8800.sh b/extensions/radxa-aic8800.sh
index 467b43b3578d..37a1c1f8f7c1 100644
--- a/extensions/radxa-aic8800.sh
+++ b/extensions/radxa-aic8800.sh
@@ -18,35 +18,41 @@ function post_install_kernel_debs__install_aic8800_dkms_package() {
 	[[ -z $AIC8800_TYPE ]] && return 0
 	api_url="https://api.github.com/repos/radxa-pkg/aic8800/releases/latest"
 	latest_version=$(curl -s "${api_url}" | jq -r '.tag_name')
-	aic8800_firmware_url="https://github.com/radxa-pkg/aic8800/releases/download/${latest_version}/aic8800-firmware_${latest_version}_all.deb"
-	aic8800_pcie_url="https://github.com/radxa-pkg/aic8800/releases/download/${latest_version}/aic8800-pcie-dkms_${latest_version}_all.deb"
-	aic8800_sdio_url="https://github.com/radxa-pkg/aic8800/releases/download/${latest_version}/aic8800-sdio-dkms_${latest_version}_all.deb"
-	aic8800_usb_url="https://github.com/radxa-pkg/aic8800/releases/download/${latest_version}/aic8800-usb-dkms_${latest_version}_all.deb"
+
+	# Determine the DKMS package name based on the requested AIC8800_TYPE.
+	declare aic8800_dkms_file_name
+	case "${AIC8800_TYPE}" in
+		"pcie") aic8800_dkms_file_name="aic8800-pcie-dkms_${latest_version}_all.deb" ;;
+		"sdio") aic8800_dkms_file_name="aic8800-sdio-dkms_${latest_version}_all.deb" ;;
+		"usb") aic8800_dkms_file_name="aic8800-usb-dkms_${latest_version}_all.deb" ;;
+		*) return 0 ;;
+	esac
+	declare aic8800_firmware_file_name="aic8800-firmware_${latest_version}_all.deb"
+
+	# Optional ghproxy mirror prefix for the download URLs.
+	declare ghproxy_header=""
 	if [[ "${GITHUB_MIRROR}" == "ghproxy" ]]; then
 		ghproxy_header="https://ghfast.top/"
-		aic8800_firmware_url=${ghproxy_header}${aic8800_firmware_url}
-		aic8800_pcie_url=${ghproxy_header}${aic8800_pcie_url}
-		aic8800_sdio_url=${ghproxy_header}${aic8800_sdio_url}
-		aic8800_usb_url=${ghproxy_header}${aic8800_usb_url}
 	fi
-	case "${AIC8800_TYPE}" in
-		"pcie")
-			aic8800_dkms_file_name=aic8800-pcie-dkms_${latest_version}_all.deb
-			use_clean_environment="yes" chroot_sdcard "wget ${aic8800_pcie_url} -P /tmp"
-			;;
-		"sdio")
-			aic8800_dkms_file_name=aic8800-sdio-dkms_${latest_version}_all.deb
-			use_clean_environment="yes" chroot_sdcard "wget ${aic8800_sdio_url} -P /tmp"
-			;;
-		"usb")
-			aic8800_dkms_file_name=aic8800-usb-dkms_${latest_version}_all.deb
-			use_clean_environment="yes" chroot_sdcard "wget ${aic8800_usb_url} -P /tmp"
-			;;
-		*)
-			return 0
-			;;
-	esac
-	use_clean_environment="yes" chroot_sdcard "wget ${aic8800_firmware_url} -P /tmp"
+	declare base_url="https://github.com/radxa-pkg/aic8800/releases/download/${latest_version}"
+
+	# Local download cache on the host; the version is part of the filename, so it doubles as the cache key.
+	declare down_dir="${SRC}/cache/radxa-aic8800-debs"
+	mkdir -p "${down_dir}"
+
+	# Download (if not already cached) and stage each deb into the chroot's /tmp for installation.
+	declare deb_file full_deb_path down_url
+	for deb_file in "${aic8800_dkms_file_name}" "${aic8800_firmware_file_name}"; do
+		full_deb_path="${down_dir}/${deb_file}"
+		if [[ ! -f "${full_deb_path}" ]]; then
+			down_url="${ghproxy_header}${base_url}/${deb_file}"
+			display_alert "Will download ${full_deb_path} from latest release..." "${EXTENSION}" "info"
+			wget --progress=dot:mega --local-encoding=UTF-8 --output-document="${full_deb_path}.tmp" "${down_url}"
+			mv -v "${full_deb_path}.tmp" "${full_deb_path}"
+		fi
+		cp -v "${full_deb_path}" "${SDCARD}/tmp/${deb_file}"
+	done
+
 	display_alert "Install aic8800 packages, will build kernel module in chroot" "${EXTENSION}" "info"
 	if [[ "${RELEASE}" == "noble" ]]; then
 		display_alert "Installing gcc-14 for DKMS build" "${EXTENSION}" "info"
@@ -54,7 +60,7 @@ function post_install_kernel_debs__install_aic8800_dkms_package() {
 		use_clean_environment="yes" chroot_sdcard "update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-14 100"
 	fi
 	declare -ag if_error_find_files_sdcard=("/var/lib/dkms/aic8800*/*/build/*.log")
-	use_clean_environment="yes" chroot_sdcard_apt_get_install "/tmp/${aic8800_dkms_file_name} /tmp/aic8800-firmware_${latest_version}_all.deb"
+	use_clean_environment="yes" chroot_sdcard_apt_get_install "/tmp/${aic8800_dkms_file_name} /tmp/${aic8800_firmware_file_name}"
 	use_clean_environment="yes" chroot_sdcard "rm -f /tmp/aic8800*.deb"
 	use_clean_environment="yes" chroot_sdcard "mkdir -p /usr/lib/systemd/network/"
 	use_clean_environment="yes" chroot_sdcard 'cat <<- EOF > /usr/lib/systemd/network/50-radxa-aic8800.link