Go to an auto glass repair place if you can't find the clips anywhere else. I'm pretty sure the clips are a standard size for all GM vehicles for this era, if your auto glass repair place doesn't sell them or carry them for the public I would then recomend going to the dealer or an auto salvage. Good luck.
1992 s10 blazer - 4.3 vortec
2003 audi A6 2.7T bi-turbo