There's a guy near Hartford CT that might be able to help. I bought my '71 Barracuda from him, & also traded various GTX & Charger parts with him. He's got tons of things stockpiled since the 1970's & knows the difference between a coupe & a fastback. His prices aren't the lowest, they're fair, & the parts are in excellent shape. He also restores trim & plastic grilles if you need something like that. Seems to be a decent guy to deal with.
His name & contact info:
Bryon Cwikla
Restoration Suppliers of Connecticut
860-646-8335
He was supposed to move his shop at one point, but I don't know if he did yet. If the tel. # doesn't work, let me know & I can get his email address when I get home.
Bob