I am looking for something better than my own design. Before the Laser I had a Laser 2 on a Kitty Hawk trailer. The Laser and Laser 2 are wider than the Sunfish, so the hull supports are at the wrong place. With my Laser 2 trailer, I hung seat belt webbing between the rear supports, but the weight of the Sunfish pulled the supports together, and the Sunfish bottom sat on the trailer axle. I then made a 2 x 6 board up to fit between the supports, pushing them apart, with slots for the spars to be captured in. The Laser 2 bow support on the Kitty Hawk was pointy like the Sunfish. The Laser support is rounded, and the Sunfish bow does not fit.
Hence the call for suggestions. Worse comes to worse, I may sell the Kitty Hawk and buy a Right On trailer, even though it is heavier, painted (it will eventually rust) and a bit longer than ideal for my storage area, and the hassle of titling a trailer in PA is significant. Major PITA I just went through with another trailer.