Kubota tiller tank

[Mowerdawg]

Ave a Kubota At70S in great shape except the fuel tank. Stove in. New is almost $400 bucks! Anyone have or know where to look for a used one?
Thanks!

 

[art]

whats the matter with it?

 

[Mowerdawg]

The fill neck where the cap threads are is damaged. I've tried to shorten it past the damage with so so results. Cap screws on about a turn but doesn't seal well. I could fix the sealing but I'd loose the threads. Catch 22.
Have any ideas?

Thanks art!