To me, the gas engines are so easy to start I wouldn't even consider an electric starter. However, if you need on, Sullivan makes one called the Megatron. The thing is a beast, I have a friend who has one, and he's used it to start a 150 before, not because he needed to, just because he didn't like flipping the prop. It seems like more effort to hook up the batteries and hoist the beast of a starter up to the nose than to just flip the prop, but if you absolutely don't want your hand in the arc, or just hate leather gloves, here she is:

http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXADJ2

Run it on 24v, and you can probably start your truck with it.