I've got a kit ready for Intelligentvision's enhanced hockey game, Fight for the Cup 2017: NHL All-Star Super Pro Hockey. When you order the ROM version, you get a PDF of my manual and an overlay image. If you'd like physical copies of these, this kit includes the 8-page manual and two overlays. You also get a cartridge label, which will come in handy if you're ordering a game board.
I've got 75 kits, and I don't expect a second run. I do still have Super Pro Baseball kits, though, so now is a good time to get one of those if you need one or are getting in on David's second run of boards.
I also made a box image for people to use on their Raspberry Pi Ultimate Flashbacks, but I don't know if it's possible down the road to have actual boxes made. My gut tells me that the1hatman will let us know when he gets around to this one.