Removed back seats, Filling empty holes with custom enclosure

Im removing my rear seats in the spring time and have seen on here before someone made a custom enclosure or something that fit in the holes where the bottom half of the seats go. it was made out of foam or something then covered with cloth. I was thinking aabout doing a fiberglass enclosure to make it level across the whole back part. If ne one has any ideas , or knows of something that might work in that area , or has seen what I'm talkin about let me know ! thanks

there is a site sponsor that has them i think it's speedengineering or something like that it's name is white with a orage background.

http://web.camaross.com/forums/showthread.php?t=355423

Good link GetaZforgetGT. A "search" on the Appearance forum, where this post belongs would have found it :). Moving to "Appearance".......

Sorry Injuneer, i had 2 different windows open and was sure i posted in the appearance section. my bad.

also thanks for the link very helpful!