Been there...removed that before. When I tell you I'm knowledgeable on these cars.... I mean I'm a genuis/god on these cars. Just saying.

We'll get you a new door Fab. I'm staying in CT this weekend and I really want to hit up the junk yard just because I'm sick of being inside. We'll find you a black gas door. There is alot of magic tricks in that little craftsmen box downstairs It'* not just heavy and in the way, well most of the time it is.
Bill you forget I have the cool Bonneville feature where my gas door locks with my doors. HA

One screwdriver can open up your super deluxe locking gas door. Fab..that would be a med sized flat blade. A pair of side cutters will enable that spring "mod".

its not that i need the door, the door is fine, i need the spring action and the metal piece that broke and i cant even see wtf is inside there. its supposed to be nice this wkend im going to take a look at it and i gotta grease my brake pedal cause it squeaks when i push it down. ill let you know when i can come up hopefully soon cause i cant afford to be stranded cause thats a mustangs job.