Well, good luck with sorting it out, fingers crossed.
On the sidenote, I can recommend a decent alternative to Volvo Oem lockable nuts -
those costed me 30GBP as oppose to McGard ones (80e from dealership, couldnt find them elsewhere back then) and from reading opinion on that brand it is the only one positioned beside McGard as for quality and reputation. That is if you are still looking for lockable ones.
No harm checking your volvo dealer aswell as Clan said, see what they have to offer.