Sorry to hear that you are getting the run around. I would go back to them and tell them that you will happily wait while they change the design so that they can warranty a whole new cooker for you since parts are not readily available for your model.
Why would they be redesigning those two items if they didn't have any issues with them? Even if it was sold as a clearance item it does come with a warranty. Tell them that and threaten to go to the Better Business Bureau and any other govt agency in your area. You do have rights as a consumer.
Red Thermapen & Red Guru DigiQII
Large Big Green Egg adopted 25MAR08
Small Big Green Egg adopted 01JUN08