I am upgrading to the cobra 13" front brakes. Im getting the calipers with the pads from Geffracing.com. What is the best place to get the rotors from. They have the cross drilled ones, but I want just the slotted. I see that tirerack has them for like $240 or so for the fronts, they are brembos. Any other places to get the slotted rotors at a good price?