There's a few of these on Alibaba/Aliexpress. I really wanted one but ran into a problem. It's not E-ATX, but proprietary sized. All of the socket ones are just too long, 19.685". So they don't even fit in a standard rack at all. If it wasn't for that, I'd buy them, even as a non-miner. I just love the form factor. Another issue depends on what you planned to do with it if NOT a miner. All the x16 slots are actually x1. It's rarer to have a "main" slot, with x8 or x16, rest still x1. And then you might think x1 isn't so bad. But some of them are actually PCIe 2.0, not 3.0, so SIGNIFICANT difference on x1. Most are single channel DIMM also, with only one I found being dual channel. I'd love to use it for some hyperconverged storage & networking server but yeah, the main issue is it's too long. =(