about getting new brakes

So, i took the car into the shop because 1) the car pulls to the left when i brake (due to a bad caliper) 2) it was making noise like crazy (needed new pads in the front) 3) the car shakes when braking (warped rotors). So after the guy said this is gonna cost $900 to do everything in stock parts i thought that was insane, so i just put on some pads in the front to stop the squeaking for now. I was wondering about getting a whole new brake kit from somewhere. I didn't know prices or where good places would be to search. Or should i just get slotted and drilled rotors, change the pads on the back, and then pay to fix just the one caliper? Any help would be greatly appreciated.

thanks,
E

Why use stock parts. You can buy rotors at Autozone or Advance for under $50 each. Pads will cost you another $40 to $50 depending on type. You can buy a reman caliper for under $100 with exchange. Do the work yourself and save a bunch of money. None of the above items are hard to change.