I know this might sound stupid, but has anyone thought about approaching Namco and asking for permission to use the Pacman image? I'm only asking as I and I'm sure many others really dig the Pacman coin.
What if we offered to pay them for the use of the image. Pointing out of course that we are a group of hobbyists that intend to produce a limited number of coins for personal use amongst ourselves with no intention of selling them for profit. That way the ball is in Namco's court they can say sure we'll charge you $xxxxxxxxxx amount of dollars = p*** off, or who knows maybe give us permission for nothing. I know it's a looooong shot and maybe I'm dreaming in which case someone pinch me, but surely it's worth a try.
The only reason I bring this up is - no offense to Pixel's atomic coin, the design is great, but to me it's a bit generic and looses the whole arcade spirit that the Pacman coin embodies.