[amsat-bb] TAPR JAMSAT TRAKBOX Questions

I am on a mission to complete all my nagging projects.

I have a TAPR JAMSAT TRAKBOX that I modified for Y2K and Turbo a while back and I am now going to replace the ancient BR lithium battery with a fresh one and install a backlighted LCD display. I find today the 16 position alphanumeric BCD switch seems flaky and unresponsive. Is that the electronics ignoring it for some reason or do these switches fail?

If the latter, does anyone know of a source of that specific pushbutton BCD switch?

Also has anyone used a USB to serial adaptor with th TRAKBOX?