Looking for Blank Mega Drive Cartridge PCB (or something that fit)

Hello people, i'm planing to build a Master System adapter to my Mega Drive, but i need something to connect it to the Mega Drive cart input, i was thinking about a faulty mega drive game, os if possible, only a blank cartridge PCB. Yes, i could simply destroy a cheap MD game but i feel bad for doing this :shrug:

If someone has something like this, please pm me :thumbsup:

PS: If someone is selling a Mega Drive power base adaptor compatible with a Japanese model 1 Mega, i would like to know. I didn't purchased one because the only ones i found were too expensive.

 

Thanks assembler, how could i forget these adapters!