I had one made at Atlantic Coastal Welding in Bayville NJ ( aka
www.speedytanks.com) about 10 years ago $500. Used thicker stock and more baffles than original.
Atlantic Coastal Welding
16 Butler Blvd
Bayville, NJ 08721
Telephone:
Toll Free 800-434-8265 or 732-269-1088
From Fairfax Va you could pickup in a day trip.