Make: magazine had a nice tutorial on casting rubber and plastic items - "Adam Savage" from Mythbusters was the author. Mostly plaster cast of the old item, mold release solution, and two-part casting rubber for the actual item. The article had links to suppliers IIRC.
http://makezine.com/projects/make-08/primer-moldmaking/
__________________
Brian
USN RET (Avionics / Cal)
CET- Consumer Repair and Avionics ('88)
"Capacitor Cosmetologist since '79"
When fuses go to work, they quit!
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