Dude, if you own the calipers, find a local shop that can drill and tap them out for you and save a butt load vs. buying the kit.
If you were near by, I'd say come on over and let me do my thing on my drill press. I bought a bit, and a tap just for doing these brakes.
If you end up buying the kit, think about selling me your old calipers will ya.
~F~