Could you talk to monome? They are an amazing open source maker of a MIDI controller that uses LED buttons. The problem is that they never seem to have stock of their products, kits, or boards. They had a few extra logic boards, but quickly sold out of those as well.
on their site it says not to “produc[e] a cheap version by using overseas factories, in large quantities with intention to resell.”
but maybe you could work something out with them so people can actually use their stuff