I recently had to turn away a few members from buying openkey-cps2 boards from me because they hit the limit on the number of boards I will sell an individual at cost. Back when I originally made openkeys I was very new to making pcbs and wasn't sure of the best way to make a panel and assembly related files. The original panel version I had made by hand, but these days there are better ways.
In hopes of getting other people to make/sell openkeys-cps2 I've re-created the panel version with kikit and from that was able to use the jlcpcb fabrication toolkit plugin...
Things are on the good way , he will have them shortly