when my brother passed he left me his 1986 gn(i think) but the rpo sticker is not on the trunk lid. i wanna make sure it is not a clone. dont know if the deck lid was replaced or what. is there another way to find out if it is a real gn?i heard sometimes there is a sheet under the carpet or in the door panels. everything appears to be real down to the correct lugs on the wheels. also is there a way to get another rpo? does someone make them?