Game Gear Flash Cart


Mid Boss
I was perusing Lan-Kwei and saw flash carts for both the Neo Geo Pocket and the Gameboy Advance... my question is, is there one for the Game Gear, and if so where could I get one? Or how might I go about making one? I saw plans for a Master System flash cart...

Thanks in advance.
I've thought about this...since the Game Gear is basically a small SMS, what if you build the SMS Flash cart, flash it with a Game Gear game then use one of those SMS to Game Gear adaptors?
SMS and Game Gear have different color memory and I/O mapping, so the SMS -> Game Gear adapter route would probably require modifying the adapter, unless the SMS/GG mode switching is handled by a BIOS.