Breitling put one in a wristwatch... they're AU$7000 and the guy in the said you need to present a pilots license if you want to buy one.
It's the Professional "Emergency" model at <a href="http://www.breitling.com/eng/models/professional/index.html" target="_blank">http://www.breitling.com/eng/models/professional/index.html</a>
Only does 121.5 though.
regz,. .-marc.