For the sake of the archives I thought I would repost this under Fuel Systems. The large 58 gallon aluminum tank that was an option in the early to mid-1990s was made by:
Skyline Industries
381 West Center
Pleasant Grove, Utah 84062
(801) 785-3534
The schematic below was included in the boat papers I received with the boat and contain all of the dimensions etc. I suppose if Skyline is still in business they could make one.

Photo of the tank:

Skyline Industries
381 West Center
Pleasant Grove, Utah 84062
(801) 785-3534
The schematic below was included in the boat papers I received with the boat and contain all of the dimensions etc. I suppose if Skyline is still in business they could make one.

Photo of the tank:
