Mazda 6 2.2D 175ps 2015 - rear discs & pads

Hi folks, just wondering if you have any recommendations for Mazda 6 servicing and brake disc/pad replacement. My vehicle health check showed the rear pads (70% worn) and discs (due to corrosion) as recommended to replace lst summer. Its a year on and would like to get sorted as part of my upcoming service. On top of the service cost I have been quoted €480 for rear pads, discs and labour from a mazda dealer in north dublin. Have been very happy with the servicing at this dealers garage (I bought the car new from them back in 2015) but just think the price is a bit steep and to be honest its a trek and a pain getting there and back (I'm based in Deansgrange, Dublin). At this stage I'm thinking it might be time to consider a more local garage. Car runs great otherwise and I'd hope to drive for another 4 years before trading.