Sorry to hear you're stuck.
Fuel Safe can be reached at 800-433-6524.
I posted on this subject before, as I just went through having a bad cell. Fuel Safe will tell you that they are only good for 4-5 years. I was quoted $4,700 for a replacement for my 42-gal tank plus shipping.
I went a different route with Nick's (Mickmate) help. Not that it helps you in your current tough spot, but if you can limp it home, something to think about.