Ronco Plastics has quoted me $275 USD for a replacement tank. Seems about right to me. They must have a mold for our model. Our original SS tank stll seems to be okay for now. Their e-mail response follows:

Dear Terry:
The cost of the tank will be $275.00 for the Hunter 42 Passage.
Please make sure you have included a drawing for your order with the inlet, outlet, vent, and size of the fittings.

Sincerely,
Sheila
Ronco Plastics, Inc.
714-259-1385 (ph)
714-259-0759 (fax)
RONCOINC@aol.com

Terry