Rear Hull Radius for 06' SSV Launch

[rbeverl1]

Does anyone know what the curvature is of the rear hull for a 2006 22 SSV Launch (from the top view of the boat)?
Is it a constant radius?
I am cutting out a new swim platform, but do not have the old one to trace.

[flipz96]

The newer boat's transoms are variable. Use scrap cardboard to make a female pattern and go from there. You may have to tweak it a couple times.