Ask and you shall recieve! (Flip Top Gas cap Adapter)
FYI...The "E" body ones also open the opposite direction (mounted to passenger side quarter panel), so if you didn't get the cap latched it would be forced open and possibly ripped off.
There was one on the E-bodies also that said fuel. The E-body one is a raised cover with outer screws and not self sealing it wont work with this adapter. Just thought I would put that out there.