Please Help me

Okay just got a DS and im looking a flash card and i heard these to the best at the moment,

i also heard that theres a flash card that has a built in (action replay sort of thing) any info on that would be appreicted

but what im really looking is someone to link me to somewere i can buy a M3 or R4, doesnt really matter which one or what the price is (aslong as its moderate) i searched for it for like an hour now and no joy
I find loads of sites that have nothing more than details on it but no actual chips, and its annoying how them sites exist

Its in the US.

CycloDS
http://www.realhotstuff.com/-c-61_105.html

Acekard2
http://www.realhotstuff.com/-c-74_99.html