Sites that sell Nintendo GB/GBA cart dumpers?

Hi, I'm looking to pick up some hardware that dumps my GameBoy & GameBoy Advance cartridges (fine with two separate items here).
Are there any sites to recommend for buying this kind of device? (hopefully that have the items in-stock).

I ended up buying a GB PocketStation (back of cartridge says GeNiUs), which is a fascinating device, but with no builtin way to offload the cartridge, it's not really what I wanted.

Thanks folks!

 

There is a gameboy dumper here:
http://asmretro.com/altane/

And for GBA there is the Flash linker:
http://www.oocities.org/gameboy_advance_roms/

I don't think the Retrode adapter works with GBA games, could be wrong tho.

 

The Retrode adapter works with GB/GBC/GBA.

 

I've got one of Benn Venn's dumpers:

http://bennvenn.com/GB_Cart_Reader_Writer.htm

He may be able to list one on eBay Australia for you to buy, or you can probably work out a deal with him personally. It's slow for the 16MB GBA carts, but it works.