Welcome aboard Kev. Is your boat the 23 lift top? Keel stepped mast?
http://www.trailrite.com/ built the trailer my 23-2 is on in 2002. Santa Ana CA. It's very easy to get more money into a trailer than the boat is worth. You might consider modifying a power boat trailer. If it is the keel stepped mast you might want to solve the problem of easily raising the mast on the road before proceeding with $$$. My other boat will need a different trailer in the near future, but I weld and have built several trailers. Never charged myself for my labor. Just the steel, running gear, paint,etc is going to cost $3500+.