Phastrone

I have a problem with the shade which ordinarily covers the rear moonroof when it's in closed position. The plastic pieces on both sides of the shade have broken off, leaving the shade always retracted.
I'm going to have to bring it to the dealer for repair, but I'd like to know what to expect. Has anyone had this problem, and how extensive is the repair? (It looks as though the plastic parts are part of the Sunroof guide, but they may be possible to purchase separately...(I hope) The plastic clips in the pic are broken and fell out.
Thanks...Jay