Here’s one of Anthony’s Game Boy Macros booting up:
Anthony can send you a Game Boy Macro for $130 (USD); $110 if you’ll provide the DS Lite to be converted. However, because his project went viral Anthony has stopped taking additional orders for now. Keep an eye on his website for updates. Alternatively, since this a pretty popular mod there are lots of guides and videos online that can help you make the mod on your own.