I had RM Trailers of Arlesford make one for my 21 and I'm sure it would work OK with a 235, they'd just have to make it so the bow winch post is forward a couple of feet compared with mine.
I had 2 "specials" on mine, a split axle with a gap to drop the keel through for winter maintenance and a "break-back" hinge at the front so you can launch the boat without getting the wheels wet, This latter on the advice of Reeds who get RM to make the trailers for the Hawk 20s and I'd been impressed with the slick launch and recovery system they have for Hawk demos from Argyle Road - not the world's best slipway!
Mine is in my front garden in Stanpit if you'd like to come and have a look.
Geoff Harwood Cygnus P21/30