Out of curiosity, how many sticks of ram do you have or hope to use? And have you had a look at so-dimm <-> dimm adapters maybe?
As for so-dimm boards, there is ASUS Prime H310T, but like the others that one too caters for a niche use case. (e.g. ultra low profile for minimal enclosures).
[Looks in case… Can’t do that. Cooler fan would block it. These things would be 52-55 mm high.]
The memory was in a Hades Canyon. Sent that back, kept the RAM. Also have a 1080 ti, 2 Samsung 960 EVO’s (256g & 1tb), two EVGA PSU’s, an AIO and a batch of fans, an Asus Gsync monitor and wishful thinking about fitting the pieces in a mini-ITX case. None of this stuff is being used, which seems rather sad, even if I don’t need another system.