I ordered them from Dominator here on the forums (together with some other stuffrob wrote:Hi Bert, where did you order the buttons? I have buttons from a knockoff SNES controller but like the original ones better.BadBert wrote:extra buttons (original gameboy, so they have the same colour)

You can also find other colours on ebay:
http://www.ebay.nl/sch/i.html?_from=R40 ... s&_sacat=0
Also the original ones:
http://www.ebay.nl/itm/NEW-A-B-Buttons- ... SwB9xXO1NL
just need the gummy conductors with those from the last link.