Racal Jetlites are no longer manufactured for the civil market as they are not ROHS compliant and they can't be bothered to get them compliant by changing materials. Instead "they are going to pursue the military market." Very short-sighted in my opinon as the military will insist on ROHS compliancy soon like they did with CAP670 compliant ILS installations.
Plus the staff are very ignorant.
So I bought Clement Clarke Airlite 100's instead. They were more than helpful and only took them about 5-6 weeks to make 20-odd headsets up to our exacting specification.