His email is pat (at ) altopro (dot) ca
You will need a new flywheel with ring gear on it, a starter motor bracket and a starter motor. The factory electric start option package also has a keyswitch and keyswitch mounting bracket.
I purchased a larger Changfa 1115 engine from Pat and it has the electric start package. I would not order such an engine without it myself, mostly because I am not as young as I'd need to be to hand start this beast.