Hi Ken,

Have you run across this option?  It consists of new conductive pads to replace the worn pads on the bottom of the buttons.  There is a video there showing how to use wire cutters to snip off the worn pad and then use silicone glue to secure a new pad in its place.

I ordered a kit on ebay for about $8.50 total.  I'll give it a try and report back if there is interest.

Dennis