I posted earlier about my question of quanity, the kit I had purchsed supplied 16 clips, I have 18 holes and seen some kits with 20 clips. I want to buy individual clips to put in before the glass man arrives, anyone know who I can go to and buy a couple of clips and send via the mail. All I see is buying another set for $$ & shipping. Does the part # cross to a common supplier such as GM part numbers?