In terms of cabinet art I've seen this:
Willis bootleg overlay ? :
Longer Instruction card(maybe some one can clean this up / print it out for me on adhesive?):
Generic BLUE Sega control panel overlay (Which I have already purchased) I'm pretty sure that these were the ones that were distributed in the Wonder Boy Kits, Should look like this:
I know the one at funspot uses a choplifter control panel overlay:
large Sega Logo's for the side art, kind of boring which is why I would prefer custom side art from that c64 box, but likely this is what was distributed in the kits; should look like this :