1996 Cadillac Deville Fuel Tank Repair

Other Category problem
1996 Cadillac Deville V8 210000 miles

I recently ran over something on the interstate which punched two holes (about a 1/4 inch in diameter) in my fuel tank. I want to get it replaced but the tank is no longer manufactured by GM and I can't find one anywhere. Any chance there is a way to repair the tank? I think it is hard plastic, or do you know of somewhere I may be able to find the tank? Thank you for your time and I look forward to your reply.

W. Alan Beckelheimer