As part of our Industrial design module in university we were given the brief of hacking a basic handheld radio (sony icf-s22) with the view to designing a radio for a specific user. I chose to design a handlebar mounted radio for a motorcyclist that would connect wirelessly to a headset within the helmet. This is how I did it.
(1) A basic radio - For this I used the sony ICF-S22 (£9.98 on amazon I think?)
(2) A Transmitter to wireless headphones - I found an incredibly basic set on Ebay. - Try and get one with a headphone jack connecting to the transmitter to save your self some hassle.
-If you are a motorcyclist you more then likely have a helmet already
(1)various tiny screwdrivers.
(2) soldering iron.
(3) pliers and snips.
(4) various workshop tools.