I'm amazed this kind of kit took so long to appear. 8bitdo have them for NES, NES Classic, SNES, SNES Classic and Genesis/MegaDrive for $20. Though you'll also need one of their receiver dongles if you want to use them on original hardware.
About Barry Kellyone of us since 9:16 AM on 10.04.2012
I'm here to kick ass and talk about video games. Mostly the second one.