Use carparts4less, its the sister company of eurocarparts. Almost all the time it's cheaper than eurocarparts even with discounts.
One of the unknown codes for carparts4less is "save75" which will take 7.5% off, which is good for big orders (as it's already really cheap). If it's around ~100 though use the voucher codes that they have on the homepage!
I just bought a rear set of bosch discs and ATE pads for £85. Not the cheapest you can find on there, but I wanted as close to OEM.