Does anyone know where or who I could get one from in the US

 

This would most likely be a custom piece. I don't think I've seen any production rear bumpers with a winch tray. Due to the location of the gas tank it may be easier to have a hitch mounted winch and only hook it up when needed as to not interfere with tank or departure angle.

This is with the assumption you are looking for something like a warn 9k or bigger winch in the rear. Might be able to fit a smaller utv or atv size winch there if just looking for help hauling things onto a trailer for instance.

 

I think when I stumble on a decent enough winch at a price I can’t pass I’ll fabricate one. I love the idea of it & the challenge... but until then - you could reach out to Chris At dark crow designs. He’s into full time rover fabrication now I believe & I bet would be a great resource.