hey man, I use this model of the cavalvy. Good price and haven't had any issues with it over past year and a half.
http://shop.ehobbyasia.com/cavalvy-e...adset-tan.html
edit: mine at the time came with pushbutton and cables, the one above linked does not.
Also make sure you buy the right style pin for the correct radio you are using. ie: Motorola style pin with Motorola radios.