Fuel Tank Help

[edszuk]

I recently purchased a 70 C10 that has been C-notched and air bagged. When I bought the truck it was taken apart and was missing the cab fuel tank. I found someone that had a clean tank but not the filler tube. I've searched a few of the parts places online and none seem to sell this part. I've seen the a replacement tank, filler hose, and gas cap. But not filler tube. I'm looking for the part that the gas cap screws on to. Any ideas would be great.

thanks,
Ed