I'm sure a couple would sell but the time and cost of developing a mold like this would make it a no go due to low sales numbers. The hooks for a mold like this are a whole other issue.
The silicone would get the guy making his jigs if he found the hooks, but honestly with tungsten bare jigs available on the internet, ready to paint, for .20 cents each a person would have to be nuts to cast them in lead. In searching sites for hard plastic bodies for airbrushing I have come across three sites that sell tungsten heads just like the ones pictured elsewhere in this thread in 4 sizes at the .20 I mentioned.