[foxfish]

I am always making one off moulds, presses, plugs etc for various fiberglass components.
I would think - unless you have access to actually specifications you will have to do some experimentation with thicknesses, layers & resin - matt ratios etc.
If you have the time & Patience I think it would be quite possible to make the blades. I would simply lay up a few pieces of 1oz matt & press them inbetween a home made jig using weights to compress the fibers.
Then you will have a base to work from, to cut out the shape & test for flex.