tempetature rating of heater toc?

can someone please tell me the temp rating of the tocs that protect the heater element on a candy cdc226 dryer or hoover equivilent ,and also where the parts can be purchased WITHOUT having to buy the whole heater as candy have said i have to!! please help! very frustrating as they are not permanatly fixed to the heater chassis , many thanks bob

bob
September 2009