1966 Panel Truck 1/4 panel

[Breadtruck from Hell]

I am getting my Panel on the road after 30 years,this is my first post I have some questions, My rear 1/4 panel is pretty much wasted(thats why I parked it) i think a Fleetside bed 1/4 will work.the damage is under the beltline.No help from body parts companies. Also am trying to find a new gas tank.The Panel only has one mounting strap all the tanks I find have two.Again no help from the parts house.Is the tank different for my Panel,its a shortbed c-10,Thanks for any help.