I just dug out the receipt. It was Graingers 4YJ23. Like I said, I really liked it. I left the thinner sit in the jug for 2 weeks. Maybe THAT was what killed it. You are right though, they are awesome. I'd just recommend emptying it and at least blowing it dry after the day is done. Mine was $27.45 down the drain. Mine had teflon seals and Viton.
I think I'll give your vendor a try!