I've done quite a few cambelts, and you dont need any special tools 90% of the time.
Turn the engine over to tdc, lock all the pulley's in place, old belt off, new belt on, tension, remove all locking pins, turn it over a few times and check everything still lines up, then job done.
You dont even need the correct locking pins to be honest. they're usually 4/5/6mm, so as long as you find something which fits tight in the hole (wheyyy! ) drill bits, allen keys, ect all work a treat.