WTB: GBA Famicom Adapter

[okame]

I can't get it until I get back from an Anime con in July that I'm currently saving for, but does anyone have a Famicom adapter for the GBA for sale? I'm talking about something like The Fami Eight, that plugs directly into the GBA SP. I have a few Famiclone multicarts, and I'd like to see if playing them on a GBA SP has better quality than my portable Famiclone system. An adapter that lets me play 2 player games would be a welcome bonus, as my portable Famiclone is just a single player machine.