HI Ed, your problems continue!!!! you need a contour plate, its got thin spines that slide to get a shape, once you have decided where to support the hull, to protect the prop and rudder, approx 1/3 2/3 bow to stern, take the plate and press the splines gently against the hull, this will give you the contour to draw onto stiff card, cut out and make a mirror copy, this will give you the template to mark onto your chosen wood, cut out with a bandsaw or a jigsaw.
I use 10mm plywood, with mahogany veneer, several coats of varnish, sanded between coats, with support rails between uprights, screwed and glued together.
Protect the hull with foam lagging. When cutting allow for the foams thickness.
OK, I'm back to making the bow support for my boat stand! No wood of fret saw to be had. Eventually Serenity will have a proper boat stand made. This time I cut out three pieces instead of two. I will laminate them using contact cement. Lets see how that goes.....