The product would require stamping, painting, and or punching in cylindrical and cone shapes.
Does it need to be in metal for a prototype? If not, do a 3d printed model and, if needed, wrap it in metal sheet/foil.
There is no cheap way to do a production quality prototype.
Answered 7 years ago
Besides 3d printing, the only "cheap" way is to join a tech shop and make them yourself.
Any craftsman will probably charge in the thousands. That being said you should call around to fabrication shops and find out their prices.
Maybe with http://www.shapeways.com/materials?li=nav and use elance to get it designed.
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