this probably wouldn't be too difficult for a good sheet metal guy to make. somebody with a little talent and a brake press.
Yes sheet metal would be easier, I would make out of stainless. You can make a wood mold and heat plastic or vinyl over the mold. I brought a cnc router, its not running this time. My plans is to change form a 3 axis to a 5 axis. The cnc router plans are for bucks and molds makingwhy not make it out of sheet metal instead of vinyl. otherwise its probably better to cast it ... or, calling Markos - 3d print it.