Is there not more interest in this? I'm also waiting for SF's Genesis cases so that I can case some Famicom games.
Did you ever make a template that you're willing to share?
It seems that minimal changes would be required to change a Famicom UGC to a Genesis case. Honestly, considering that the OEM Genesis cases fit Famicom better than UGC, I'm surprised there hasn't already been interest in making Famicom covers at this style.
I only have a couple of Famicom carts at the moment, but I'm planning to have more soon. Right now, I have MOTHER and Ys (1). I'm looking at the early Final Fantasy games, the other Ys games, and eventually the Dragon Quest games. Do you know if raws are already available for a lot of Famicom games?