I have a Arctic Sun bullet style, stainless, piezo ignition, patio heater.  I was I need the thermocoupler components.  While cleaning a spiderweb out of the pilot light assembly, the thermocoupler broke off.  I have a PDF with pictures of the Unit and the problem if you'd like to take a look.  How sells replacement parts for Arctic patio heaters

Heating & Cooling - Arctic Products - Lil' Arctic Sun Patio Heater