Mate, I am currently doing the same brake up grade on my Ra28 and am in the middle of of purchasing my rotors from specialised brake and clutch in sydney. I got my struts and hubs for $50 for the pair and was quoted a price of $120 each for the calipars. The exact price of the rotors I don't knwow approx 300 ish. If there was more of us we could purchase them in bulk, maybe get a cheaper price.