Radio Shack is running the 33-1253 wireless headphones for 39.99 until 6-26-10. You will also need a 1/4 x 1/8 phone adapter. Depending on where you mount the transmitter you'll need an extension cord. I buy those 6 inch phone splitters and cut one wire off. These phones are NOT Bluetooth and have zero lag. I have been using them for 3 years at least.
http://www.radioshack.com/product/index.jsp?productId=2255017
Your local RS will sell them at this price or get them in for you.
http://www.radioshack.com/product/index.jsp?productId=2255017
Your local RS will sell them at this price or get them in for you.