French,
Look about halfway down this thread...
http://audiokarma.org/forums/showthread.php?t=17981
and you'll see the Hoffman Solar Radio that I used the flash battery in. I had wrapped tape around it so it would fit better. IIRC, I found the battery at Walmart or Walgreens. That was a couple of years ago. I'm not home right now, so can't really get the radio to tell you the number on the battery. It sounds like this battery would damn near fit perfectly in your remote.