If you browse around ICDO... ICDO › Forums › Marker Talk › ProMaster › Promaster FAQ
I think the kila board is the only one readily available new. Kila Products, LLC
I think the lasoya pm board is supposed to be a "kila lite" version, but I haven't been able to find the difference.
'Nobody', '63VDub', and some others (maloneoni) are around MCB and ICDO and might have some board ideas (as well as plain old ram and lpr mods).