I personally have the Element Zsordin headset. I purchased it here:
http://airsoft-club.com/shop/tactical-gear/communication/radio-accessories/element-sordin-style-tactical-headset-woodland-camo
It uses 2 AAA batteries to power the mics on the earcups and the amplification seems to work pretty well. These also have a chip in them that will cut the mics when they detect a noise over 85db so that you don't blow your ears out. You would have to get a PTT for your specific radio, but the TCI types seem to be the most reliable. Hope this helps.