[suicideneil]

All e RC sells the hyperion CX lipos which are pretty cheap ( 25/40C ).

Otherwise:

http://www.cheapbatterypacks.com/?si...gid=liposelect
http://www.commonsenserc.com/page.ph...ttery_html.php
http://www.onlybatterypacks.com/
http://www.spcracing.com/index.php
http://www.xtremepowersystems.net/products.php?cat=16

I would use hobbypartz or the hobbyking USA warehouse too, yeah.