Or, you can convert the board. I converted a lot of oddball boards back when I had a big board collection. I saw no reason to make a jamma adaptor for some no-name game that used a unique wiring harness when I could convert the board in half the time and for a lot less in parts.
This involves a soldering iron, a fingerboard and some wire. Don't do it to a valuable board. On the no-name/crap boards I did it to I got about triple going rate for them back when I did my big board sell off.