Kelsey Hayes Brake Questions.

I brought the beast out of storage for the winter. While driving around I noticed some brake noise and it looks like at some point my front caliber was hanging up and left some nice grooves in the rotors. Here are my questions. I found the caliber rebuild kits and wondering how hard are they to do? I also where do I find new rotors? I also was going to replace the wheel bearings while I had everything apart so any help there would be great. Did the calibers come painted from the factory? Thank you in advance for any help.

Mike