eh..
My problem is that we have to do that for real in 1/12 (or 1/10 scale..or even bigger).
Already asked this afternoon some masterman I know.
An "industrial" cad/cam prototype will come too expensive (they told me, for ONE piece price can be around 10.000 euros,and the final product is usually for mass production series), I also have artigians really better than machines
...but also here the price is quite expensive.
Such master will be easy around 8.000 euros...so no idea for the final price for the finished the car.
The work is not too far away from scratchbuilding ships or planes in big scales; the problem in such modelling is when u do that nice u will never sell.
For small scales as 1/43, I usually work with plastic,white milliput and balsa,and the final look is nearly always perfect,before the cast it in resin for the final (limited run)production.
I'll try ask now to some very good guys I know in France,but before I wanted be sure nothing as radio controlled cars from polistil was done in the 70s about Jota (svj is a factory replica of the unique crashedJota).
Btw, IMHO was an ugly car...