I picked them up at the dealer, I paid $ 7.23 for 11 fasteners. That was their whole inventory...
I broke 1 at one side and 2 at the other, but even the ones that come out in one piece weren't too great.
I don't have a part-nr. as their invoice printer was down and I didn't really bother for that amount.
You need to get the talcum off pretty good, otherwise the glue won't stick on the rubber.