You probably can get one at your LHS and get something like that. The SMC pack would be my first choice I've made some packs with those IB cell and the are top of the line for power and and running time.(my opinon)
[link]http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXKUZ5&P=7[/link]
[link]http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXFJT1&P=7[/link]
[link]http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXHFP6&P=ML[/link]

If your looking for a decent charger get this one for the price you can beat it, I have two of those.
[link]http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXCLD5&P=ML[/link]