Pro Jumps/Power Risers?

Yes. People building the Vari-EZE type experimental aircraft have been building laminated fibergl springs to use for landing gear since the late 70's. This is the same type the power risers/ pro jumps/ etc. use. Further, you can get a good tubing bender and make the frames. Pull some bindings off of a snowboard and you are almost there. You'll still need pivot bushings(br or bronze), hardware, the traction nubs, and various aluminum plates.By the time you purchase the materials and tools and the tons of time it will take to make them(and uming they'll turn out right the first time) you'd be way better off buying some.