Hi!
the company is CD. there site is
http://www.aircraftheater.com/. They are very nice people. I was surprised by the information they shared with me.
They told me if an aircraft has a heater out of production, they can draw up the plans and have it FAA approved within 30 days. Fortuanately for us, they still mfg. our heaters.
since I have a small pilot shop business and former flight school owner, I supposedly got a decent discount on the heater.
John