Making Your Headphones Wireless?

Chuck Chunder asks: "I've recently been looking at getting some wireless headphones of the RF rather than infra-red variety. After looking around for a bit it struck me that I don't actually want a whole new set of headphones. I already have a nice pair of headphones as well as earphones. What I really want is an RF transmitter and a small clip on receiver that I can plug my existing headphones/earphones into. The problem is, I can't find anyone selling what I am describing, even geeky places don't quite have what I'm looking for. Does anyone know/have experience of such a product?"

"I see several advantages to this:

• Adaptability: I can then use earphones/headphones as appropriate for the activity, or possibly use it as an RF link between hardware in different rooms
• Replacability: If I damage the headphones I only have to replace them, not the whole headphone/receiver unit; this bit will hopefully lead to...
• Lower costs

Has anyone seen something like this, before?"