Nope, that's not what I am talking about. As I said, around 2015 they changed the design of the rails and chock on the single (and double) trailer so the front tire will fit between the rails instead of tending to ride up on them, twisting the steering a bit. It is available as a replacement part from Kendon.
I was looking at the Baxley trailers and the Ramp free trailers a while back, they both look like nice units. A little larger the the Kendon units but like you said not sure what kind of dealer network they have. I have contacted both and they are pretty much custom build with each having a couple of designs for Trike, Dual Bike trailers or single bike trailers. Everyonce in a while you will see a used trailer on Cycle Trader. Have seen all the brands listed on CT.