Looking for unubtanium part ideas
I can do the CAD BUT the cost to produce would be prohibitive
3d print in plastic to inconel to all kinds of other materials is available. You will have to either hand finish the part or pay a LOT to avoid the rough stepping on complex surfaces.
3d print the plugs, and hand finish the surfaces, and molds can be made for fiberglass, carbon, or kevlar. This method is less expensive, but it's time intensive, better for a small shop for parts runs in low volume.
I used to do that for both automotive and aerospace.
3d printed molds are dogshit. It is better to either pull the mold from a sample part or cnc the mold from aluminum or other material. Aluminum molds are expensive to make, but last for a lot of pulls. They are the nicest to work from.