@ Eddy. The first stage will be to have a test kit printed on a 3D printer, to check for fit, and discover glaring errors. Then I'll have to work the finances out to know if it will be offered as full kit or a conversion kit and in resin or as an injection kit. Although it is a private venture, much will depend on possible co-operation with existing manufacturers.
If it catches on, the next one will be the SdKfz247.
I'm using Sketchup to draw this SdKfz221 in 3D.
HTH
Rob