GBA Flash Carts

Hey All,I have just purchased myself a Game Boy Micro, I already have a DS lite, but I needed something that could fit into my suit pocket for train rides to and from work......anyaway,I want to get a Flash Card for it but I am stumped and would like some advice on;1. Which is the best option2. Where can I purchase one (I am in Australia)Thanks for your assisstance.

Look at http://gbatemp.net/ then Reviews, and look at the GBA flashcarts there.

Thanks Adandjones,and sorry for posting in the wrong section..... :P

Thanks !
I'll try to do this today.