Trailer A/C recommendation

[Shadylane]

I have a 2006 Pace American 26ft that the A/C works intermittently. It's an older Carrier IV. I've replaced a few parts that I thought might cure it but since they no longer make these units or replacement parts I've decided it's time for a new unit.
looking for recommendations on brands, would prefer a soft start as it has to run off of a Yamaha 3000 inverter generator.

Kelly Lane