PEGGIE, always the best profile pic, but I've still not seen this tank at Ronco.
That's because Ronco didn't make it...and I wasn't suggesting they did. But you should be able to find one among their 400+ tanks that will work and might even be bigger...maybe not in that space, but where is it written that it has to be?
But if you're determined to go with a plug & play replacement, I'm not sure who made the original...Hunter used several sources including an aluminum fabricator (aluminum is ok for water) whose name escapes me at the moment, but someone else here will know. If your tank is plastic, try Duraweld
DURAWELD or Inca Plastics
Inca Plastics. However, if it was Inca, their tank walls are only 3/16" thick, which isn't strong enough to support the weight of the contents--8.333 lbs/gal. That results in bulging and flexing which results in cracked tanks unless all 4 vertical walls are completely supported....so you don't want another one of theirs!
Glad you like the profile pic. It was definitely time for a new one...the last one was shot in '08.