A couple updates:
- got a bulk quote for 10 aluminum brackets for $73/each
- got a quote for a 3D print (the Thingiverse 3 pc model) for $29, shipped
I'd prefer aluminum of course, but might give the 3D one a shot. Unless someone has inventory laying around, that's probably the most economical way to mount he MeachBoard64 right now (as long as it's durable).