Cost of rear discs. Any recommendations?

[ARSEY4]

Whats the ball park figure for these. I have seen around the £600 mark but this is more than I paid for genuine fronts. has anyone got any recommendations?

[ARSEY4]

Just for reference, I emailed Tom at Crewe Audi and they can do rear discs for £600 and pads for £72 including postage.