Help finding replacement air vent - '99

I recently purchased by first 'Burb - a '99 with 100K miles on it. I purchased it as a 3rd vehicle, but now I love it so much that I'm driving it almost exclusively! That has driven me to want to fix a few minor items.

Can someone suggest good websites for finding a replacement air vent. The part I need is for the rear (2nd row) overhead vent. I just need the cover that pops into the rectangular section coming out of the ceiling. I've searched a number of sites and I can't find the specific part.

Alternatively, If someone could suggest a book/manual that I could buy that has catalog of every part with the Chevy's mfg part number, then I could more effectively look for the part by searching with the mfg part no.

Any help would be greatly appreciated. I'm no a repair expert, but I do like fiddle around with the easy stuff.

Go to the dealer. They will take your vin number and about 20 bucks and get you a new one. The new assembly comes with the vent and the insert. The vin also tells them the color. Watch out for water leaks on the suburban!

I think I have these in gray from a 99 burb I parted out, let me know if you are interested.

Yes, I'm still interested!