GPS to Chatterbox - HOW??

[84xj1100]

My wife and I both have the chatterbox FRS system which we use to talk rider to rider. They also have an aux port to plug in an MP3 player which I use pretty much always. I have an 86 Standard Venture (so no goodies on board). That being said, I have a Garmin 265wt that I want to mount to the bike (in a waterproof case designed specifically for that)....

 

Here's the problem.......how do I get the voice to my helmet headset??? The 265 is bluetooth compatable but the Chatterbox isn't.......the only input is the mp3 jack.

 

Anyone up on the new technology have any suggestions??:starz: