If it's just the contact strip that's no longer working, you could simply disconnect the low voltage wire from the port and put a simple push button switch on the wire that could be mounted next to the port.  

Unfortunately, Sears CV products were sub-par compared to the industry standard.  The pipes were quite small compared to todays 2" CV lines.

Fortunately, new CV ports and piping is inexpensive if you want to replace it yourself. 

Best of luck to you.