Is that supposed to say acade rather than arcade? Does the GBA run an emulator or just normal GBA games?
Can you make a video of you playing a game on it? Very cool.
I've got a gameboy advance, not sure if it would work (it's one of the old ones with the buttons on either side of the screen).
I'd happily exchange it for a couple of laser cut side panels
Edit: don't worry if that's not possible though, e-mail me (in trust) if you need it.
I can send you the cut files, honestly makng this out of mdf is easy to cut. Make it out of cardboard too - that will work.