After that advice you need a BC box from the old escorts, i havent broken mine yet and abuse it most days. Granted i do abuse it with a touch of mechanical sympathy.

A person can break something VERY quickly if they intend to.

I'm pretty sure the ST is a rear mounted starter so there are plenty of those about from different fiestas and escorts (mk5 onwards). but the gear ratio's will be different so it wont drive the same as before unless you get the same box.