Try looking up this company: shapeways.com. They can print (or have looked into it) even in titanium. Most of their capability is with sla printing.

Hello, May I suggest you contact the good people at VAC Sales USA. They should be able to help. VAC Sales USA  270-769-1333  2935 Dolphin Dr.suite 102Elizabethtown, Ky.  42701

Hello Mr. Kumar,   There are several ways to approach your question but I suppose the simplist way is to use two ''double Throw'' switch coupled with a reversible latching relay. I, suspecting the horsepower of the motor would be high, two 400 series miniture snap action switch wired as such to control the field current to the ...