Found it; it was called the PT-68K by Peter Stark, in October 1987 of Radio-Electronics. It ran SK*DOS, was programmed in Basic and cost about $470.
Ha, Ha, Ha!
Um, that is what 68K based OS-9 computer systems were based on at Delmar Company - PT68K2 and PT68K5 computer boards assembled by Peripheral Technologies of Marietta Georgia.
We wrote the VGA video drivers for that system and had a GUI ported to it.
You don't want to try to build one, but if you're serious I can still get a bare board.
It has ISA XT expansion slots.