Where can I get a replacement gas tank for a lincoln welder? Prefferably a plastic 4 gal.?

where can i get a replacement gas tank for my lincoln welder prefferably a plastic 4 gallon?|||I am assuming you are meaning a gasoline tank. Why not use a boat gas tank. They come in metal or plastic, various sizes, and are very safe to use.|||any dealer who sells the welding units or surf the net for LINCOLN and go to their repair/parts section