Cudda, Shudda, Wish this Wudda been placed in the "Body" section........ however, as it appears here and so it shall it be for now.
I tried to find the disc/DVD and could not, about building molds using a variety if types of silicones, epoxies, esters, etc. and when I do find it. I'll list it FYI.
Last week I bought a f-glass 27 roadster body for my project. Like I now have ZFGS..... that's, Zero F.... Garage Space, but I will be pulling molds off this body to produce panels to allow me to lenghen and widen this body.
While I'm only interested in producing sections of this body, the concept and approach in doing so is the same for the whole body - understanding of course, the need to "split" mold sections in accordance to interference of compound curves which would inhibit proper release.
So........ let's look at someone selling body molds and analyze the marketing thrust regardless if it's for a T-Bucket, '27 Roadster, 32 Coupe or 41 Willis.... in exponential order, as it were.
If I had (I don't) a T-bucket body and decided to create a mold from it, I probably could do so. But what would I have? It would be just another T-Bucket body. My claim to fame would be my location, my crating charge and the cost of freight to you. That isn't worth much.
I would need a hook. A lower body. a longer body, a taller body. a shorter body, a smoother body, a lighter body, a stronger body- something to entice the buyer to consider my body over the next guys' and here is where advertsiing and market saturation enter.
I can build a mold for you. Your cost for that mold will be not only my cost to produce the mold for you times a hety margin plus a qualty of mold in terms of the numnber of bodies you can produce from it. Molds and plugs have a service life just like aluminum rockers and rods.
If I build a quality mold good for fifty bodies, I'm going to charge you something on a per body basis to amortized my mold building expertise and (important here) foregone income were I to offer bodies of my own. That makes the mold rather spendy by comparison to just buying a body from one of our respected sponors. Look'em up and buy from them.
Move forward and build the car.
Let me know if you wish to proceed.