Just had my front rotors machined by Masterbrakes in Wellington, they offer a mobile service that (from the quotes I got from other places) is cheaper than taking your rotors into a shop for machining. I was charged $55.20 a pair. The guy was fast and on time and did an awesome job.
P.S. they need access to a 240v mains socket for the lathe.
masterbrakes.co.nz