Path, I think you're right about the brand and thanks for the link. I can just see the white logo thingy in the back corner. Northwood will sell me a new tub at a reasonable price. I need another large item from them so I'm going to drive to Oregon to save shipping/crating on everything.
Kip, this is the only combo unit of this size and has a very distinct shape. Trying to use something else would require a new surround ($$$) and take drastic surgery.
I'm going to fiberglass (or have it done) the area that's weak to keep this from happening again. It should not have cracked under my 164# frame!