Front wheel bearings are more likely to go as there's more load onthem due to the steering engine/gearbox etc etc.
Rear wheel bearings should not go. I don't think i have ever changed a rear wheel bearing on any of my cars.
You can only but ask, worse case scenario is they say no
The only bearing ever IMo to buy are Renault official ones.
Not to mention any compnaies names but I recoently had some boxed up brand new fromt a certain big names motorfactory brearings and they were more worn then the ones I was changing.