6' Galvanized or Plastic Stock Trough (Yuba City)

Hello Craigslist, I am looking for a 6 foot diameter galvanized or plastic poly/structural foam stock trough, such as the Rubbermaid or CountyLine/Behlen ~400 gallon stock troughs you can find at Tractor Supply.
My wife is an outdoorsy/gardening type but has a single, damaged kidney from a childhood illness and is unable to sweat properly so the summer heat hits her like a truck.
My parents/landlords have not addressed issues with the insulation and HVAC in our home quickly enough and the summer heat is starting to hit, but they did give us the OK to set up a pool.
We tried the 10'-12' pop-up plastic pools you can get off of Amazon but stray cats in our neighborhood come through our yard at night and scratch and slash anything we set up within a few days.
I am hoping to secure a stock trough to build a sturdy cat-proof pool in our backyard without having to shell out the ~$500+ it'd take to buy one from Tractor Supply, since I need to buy pumps and filters on top of that.
I will need to arrange a vehicle but I can come to you and pick it up if you have one you're looking to get rid of for free or cheap.
Thanks in advance for your consideration!