Gas cap 1972 Demon

I'm sorry to hear you are having so many problems finding the right cap.

I have gas cap from a 72 Duster...sits flush, still on car.
I would do $25 shipped if you want it.

Year One shows a replacement cap with the following details:
Standard non-vented fuel cap for:
1971 Demon and Duster models (built after May 71).
1972 Demon and 1972-1976 Duster models.
1973-1976 Dart Sport models.

Also, some good information here:
In desparate need of early model 71 dart fuel cap

Please let me know if you are interested.
Thanks!
burg