Found an interesting off-the-shelf server, 2 Bay High-Performance Desktop NAS with Intel N150 AMD Ryzen 7 5825U Processor Dual 2.5GbE Network Connectivity.
I won’t recommend on buying one though. It’s simply too expensive for just a board, but perhaps it’s cheap enough, if you consider getting the same modern hardware. Or not much more. It’s stylish and all.
Me, I’d go with any used PC you can get, it’ll deal with the whatever task gracefully enough, and does not have to look awful, be noisy and all that.