I ordered under hood insulation for a 84 Z28. Service was good. Arrived in about a week since it was special order. There was one hole that did no line up for the clip, It was no big deal to me especially since the other vendors I checked out for the insulation wanted to charge truck frieght.
The web site could use a little work though. If you check it out type in what you are looking for don't be year specific. Eckler's Camaro Parts - 1-800-283-0691

 

Just order a catalog like I did, Lots of pictures, colored pictures and it's free.

 

I have a catalog also. I received mine earlier this year and since then they have added new parts.

 

I have ordered from them for a few years now, don't have any complaints.