11 3/4 rotor sources, price and quality

If you have a source for quality inexpensive Rotors for the 11 3/4 rotor upgrade please share.

I Bought the Dr. Diff Upgrade kit, brakes, pads, bearings, master cylinder etc. I have the Spindles with the adapters I just find myself hesitating on pulling the trigger on buying them.

I assume the drilled slotted rotors are worth it for cooling.

Any advice is welcome!


Thanks
Mike