Somewhere on the A12 board, there was a member who had restored their filler neck and it looked fantastic.

I couldn't find the thread, but its maybe 18 months old at most.

If I recall, they used some eastwood tinning/lead on the outside and then painted some glyptol red/black on the ends. This was what they had found on a few survivor cars.

FOUND IT!

http://a12mopar.com/yabb/YaBB.pl?num=1238949100/3#3