I would strongly recommend getting genuine Volvo parts from some of the sellers that offer them at trade prices on e-bay.
Such as this seller :
https://www.ebay.co.uk/itm/Genuine-V...UAAOSwgmJX0Btx
If you e-mail or ring them with your registration number they will match the exact parts you need from the Volvo computer system and you get them at trade price. There is no better quality parts available - members on hear frequently complain about the poor quality of aftermarket brake parts from the likes of Apec, Mintex, National, Brembo etc. especially on the heavier/XC models.
If you do prefer to buy aftermarket however, Pagid and ATE tend to be the most favorable.