I might be able to supplie you with a design for making simple spokeshaves out of wood, let me tinker with that a little ;)

Or.. this looks very interesting as well: https://www.amazon.com/SUPVOX-spokeshave-woodworking-planing-trimming/dp/B07S7YQQD1 the sole looks like it may need some smoothing and the blade needs sharpening, but the design looks solid.

They are even cheaper on aliexpress! Around $5 a piece