It’s a Trailers USA, a boutique, mostly custom designed trailer, but really high quality (mine is also 8’0 wide). Unfortunately he closed up shop a few years ago due to illness in the family…
But if you do want these types of features, Adam, 4 star and I’m sure cimarron will build them. This is built off the 3 horse slant bp design. The inside is all different, but the frame itself was standard for their production, and that’s the part you don’t want to mess around with!
Things that I had done (some of this was for driving, but it is all useful):
Insulated
Shelf with a generous lip above the windows in the nose (plus d rings so a strap can secure larger items)
Plug in power, even if you don’t get a 30 amp, just getting a standard plug in+outlet is INCREDIBLY useful
Divider is built on a track so center divider slides all the way over, I also had an option for 50/50 and 65/35 settings with 2 sets of butt/chest bars. I typically only haul 1 lg pony, so he gets a big stall and the ebike gets the small slot. Even if you don’t do the optional bars, being able to slide the divider over is a game changer in trailer life.
Stud gates that are removable and swing BOTH ways
Things I wish I had done: a hose hookup somewhere in the back for a cowboy shower and/or camper sink.