Barry,
Perhaps you don't need one. Here's why:
You can use your laptop with the latest version of Google chrome and a microphone (if your laptop doesn't already have one built in) to record your voice and have it automagically convert it to text.
Things you'll need:
A laptop (with built in microphone)
A microphone to plug into your laptop if it doesn't have one built in.
Latest version of Google Chrome installed: https://www.google.com/intl/en/chrome/browser/
Internet access
Once you have all the items above, go to this web page:
http://translate.google.com/
Look for the microphone in the lower left corner of the "text window" that appears on screen.
After you click the microphone, a small box will appear. Begin speaking.
Once you're done you can click "Cancel"
After you're done speaking, you can copy the text and paste it into your favorite word processing program.
Give it a try. Good luck!
CH
P.S. If that isn't possible, how about video recording it and posting to YouTube? I'm sure several folks would enjoy seeing anything you have to demonstrate.