I'm designing a tool length measurement device for a mill.
I've settled on the mechanical design which is a tripod arrangement, but 
what I'm after is some contacts to actually make and break the connections.
I know such beasts exist but I'm having difficulty finding sources for them.

At the moment its looking like I'll have to settle with gold plated PCB 
as the contact material.

I'm looking for gold at the moment because I want to run the contacts at 
a very low current/voltage to minimise arcing.
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