Patrick,
Thank you. That certainly looks like the right item. I'm not surpised it's discontinued. I wonder if any other radio model uses a button which is alike enough to use as a substitute. I suspect there isn't one, and if not, I'm not out a lot of money. The radio came with an aftermarket speaker mike, so I can probably tape over the hole in the side of the radio and just use the speaker mike.
Thanks again for your time.
73,
Dennis - KC0YKN