Alot of aftermarket fuel cells have adapters for remote fills, and are fairly inexpensive.
Junkyard tanks are easy to come by too, just make sure they look to be in decent shape. Many imports have smaller, easy to install tanks, we've used a few...
The B and C body tanks will probably be too long. I had one customized for my Coupe when I first got it on the road, it had to be basically cut in half, the distance from the rear to the rear of the trunk is too short, on my 1940 Coupe anyways...