welcome aboard @art44,
yup, those images are a bit old, but you can build a new image with fenix script:
fenix is just a simple script for building Ubuntu and Debian images, you can build the firmware from source as well, but fenix helps save time and builds the entire firmware on the spot (remember to use fenix, you need a host linux computer)
presumably because it will require the need to root permissions for building the kernel and rootfs, you can ask @numbqq and @Frank more about this if you like,
that was a very long time ago, PCIe works again, please note if you need to use an SSD, you need to use one of the tested compatible SSDs
cheers