I recently replaced my quarters. I'd reason to bet you could find some pics over on Camaros.net though. I did a quick Google search, but I couldn't find any. I have some pics saved at home. I'll try to remember to post them later. Did you try looking at it from the bottom of the lip? From inside the trunk? You might be able to see it that way also. Make sure you look on both sides. There have been cases where one of the quarters wasn't stamped for one reason or another.
I'm not sure why the responses are lacking around here for certain things lately, but have patience. More than one CRG member has plenty of pics of the stamps also.