Is there a source for 2.5mm 3C plugs? 
They are used for cell phone headsets. Cordless phones sometimes have jacks as well. I use one a lot, especially if I am going to be on the phone a while. They are the common failure point for these devices. 

DigiKey shows only 2c in their catalog.

John Ferrell    W8CCW
"My Competition is not my enemy"
http://DixieNC.US
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