Hideeho
I've got a couple from this guy.

http://www.throttleworkx.com/

I use the 4000mah 60c. @ less than $50 shipped for 1 & less than $90 shipped for 2 they are a great deal. He rates them @ 2c charge, but charge @ 1c @ home & 5c @ the track. I have been running them for about 4 months with 4-5 cycles per week each (full dump to 3.2v cut off for practice & 5-10 minute heats for races). So far they have held up very well. I really like them. A few other locals have tried my packs & found them to be as good or better than any thing out there. They are not roar legal though. When I order 4c's for my agama I will be ordering from him. He also has a thread on rctech you can get other testamonials from as well.