Not exactly the best headset in the business, but try a TELEX Airman 750.
It is basically a 'walkman' style lightweight headset.
It comes complete with an adjustable gain mic, allowing you to set it up for use with a wide varity of other headsets on an int. system.
Our company use this type as standard, and it would be ideal in a low noise cockpit, however in a 146 I find something like a sennheiser, although heavier, overall more comfortable.
Try Transair's website for price ect..