I've been itching to play all my old gameboy color games, and goomba's okay.. but it's certainly not perfect. I'm looking heavily into just getting a flash cart for the gameboy color. My question is - do these even exist anymore? If so - what is there to recommend? Do any of you having any lying around that you'd be willing to sell? Also, would these gbc flash cards work in the gameboy advance/sp/regular? Thanks!