SFF PCs with NVMe slots

I'm currently trying to build out a ZFS array with a few 8TB drives I have lying around. I have one of these 5-port NVMe SATA controllers and am looking for advice on which SFF PC to buy.

I had a spare NUC that I thought had a NVMe slot, but turns out it's SATA only.

Does anyone have any recommendations for reasonably cheap (second hand is fine) machines that would have: gigabit ethernet, USB3.0+, M.2 slot that supports NVMe?

Thanks in advance!