The dimentions are not shown on these packs but I'm guessing one of them will fall into your size range. The Golden packs come with a BMS but the stand alone do not so I would recommend contacting the suppler and ask for the dimentions as well as how they are protecting the cells (BMS or ??).

Bob

http://store.peakbattery.com/12lfpba.html
http://www.businesswire.com/portal/s...63&newsLang=en

http://www.goldenmotor.ca/categories/Batteries/