Hi @5-11under - Hope you don't mind my inserting myself into this conversation, but I was recently out looking at random antiques and things with my wife and found someone selling unpopulated PCBs that I thought were really cool. In researching them it turned out that they are "sheets" of Microvision cartridge PCBs (see attached pictures). During my research, I found this thread and figured I should contact you to see if you're interested in these. I'm an NES homebrewer and my first thought was that if someone found and offered me a bunch of original NROM or similar Nintendo made cartridge PCBs, I'd be psyched to use them. Anyway, wanted to let you know they're out there if you're interested. Take care.