central locking

hi all, had the passenger door in bits today trying to fix the central lock issue..

discovered a loose wire ( black single wire on the small plug on central lock loom ).. so re-soldered that, everything back together...

now All doors lock from the passenger door button and unlock.. but the passenger door button dosent move.. so fixed a little bit of it, but figure it must be the motor too then ????

easy to get hold of ?
did i read someplace you can get a rear door motor and swap it as its cheaper ?

thanks