Tim,
    I can't help with the parts, but you also asked about cleaning the fuel tank. I have cleaned several with the garden hose and a good nozzle. This loosens the crud pretty nicely and afterward I put the halogen work lights up close on the tank and this dries out the interior very well. I also had one exteme case where I had to cut a 3 inch X 10 inch hole in the tank and scrape the old crud out with a putty knife. Aircaft Remover works well to soften up any gas that has coagulated in the tank. Afterward I made a patch slightly larger than the hole and put it on the inside and brazed it.....totally invisable when done!
                          Cal