I believe, but do not quote me..

Sherman Parts makes 400 hoods and inserts, So does Goodmark.

http://store.shermanparts.com/cgi-bin/sherman/product_list.html?img_num=830_831

http://www.goodmarkindustries.com/HomePage.html

I am not up on who makes what anymore...But I suggest buying original inserts if you have an original hood.

If you do not have an original hood, shop around for ones that fit properly. Nothing looks nastier or "bad" than the focal point of your car (dual scooped hood) and having inserts that have bad gaps or stick up and not flush with the hood.

IMO...these parts are very important.