Sennheiser HMEC 26 Aviation Headset. On eBay, used, $308 + shipping, around $370. - Headsets | Facebook Marketplace | Facebook
Sennheiser HMEC 45-ka NoiseGard Aviation Dual Plug Pilot Headset HZR 62 Vol for sale online | eBay
Amazon.com: Crystal Mic Pro Universal Aviation Microphone for Noise Cancelling Headphones. Transform Your Sennheiser/Sony/Bose Headphone into an ANR Pilot Headset : Electronics
Sennheiser Adds Model to HMEC 460 Series - KITPLANES