Got mine from eurocarparts.com last year.
You can get all the prices online, think it came to around £200 for front disks, pads, rear disks, pads, and bearings.
The rear disks came bare so you could concieveably use the old bearings, but at £20 each why bother. You then have to press in the bearings and find a circlip (or reuse the old one).
The ABS ring has to be reused and I had to buy a gear puller (£8) to get it off, but was dead easy. Trying to lever it off etc. with other tools lying around is a waste of time.
Much cheaper than I was quoted from Renault.