This 3d printable split belly bait mold is modeled on Solidworks.
You can print this with a 3d printer and inject silicone into it. Pins are designed with a 0.3mm tolerance to fit each other.
Note: Do not forget! If you will use more than 50° C silicones, you shouldn't use PLA, since PLA will soften at higher temperatures. So you should use something like ABS material.
Shared formats: -max -fbx -obj -sldprt -stl -step
Please do not hesitate to contact me if anything goes wrong.