Fuel tanks can be tricky to refurbish - not the exterior, although that still requires a high skills set to achieve, but the interior. When heavy or even light rust is present the machine will be forever plagued with poor running due to a blocked fuel cock and particles of contaminates working through to the carburettor jets or fuel injection. In short, a complete nightmare!
When the opportunity comes along to renew the tank you would be wise to take it.
Other fuel tanks you may wish to consider before making your final order choice:
4410015H80YAY
4410015H81YAY
4410015H80YKZ
4410015H80YPA
Easier to renew than refurbish the old fuel tank. Consider ordering new fuel tank mounting cushions at the same time, and perhaps a new filler cap?