Im not particularly savvy when it comes to brakes. So may have to get someone to the job forme. Is it worth giving VW a try and see if they can use a repair kit on the rears. Strangely everywhere the rears are more expensive
Yep, because they break frequently....so a standard issue supply and demand business model there
VW did mine. It was in for a major service and they called to say the rears had seized, which I knew anyway. As it was the middle of winter, cold and wet, I retorted with immortal words "Ahh, go on then, whilst you've got it". New discs, new pads, 2 rigid lines, 2 calipers and a brake flush/bleed later......problem solved. All for the bargain price of £800
They're good to me with MOTs (schitty sports cat), parts discounts and tyres so it's swings and roundabouts really. They tried the rebuild route first but said they were too fooked to repair. The pistons & bores were corroded and pitted to buggery, and once that happens, new seals don't last 5 minutes and the calipers are therefore scrap.
If your pistons and bores are spotless, by all means go with a rebuild.....but it's usually the handbrake mechanism that seizes up and that's a right frig.