At the suggestion of “Ross of Ventura” I contacted BBQ Bonanza and bought three Tel-Tru thermometers, one for my large, one for my small and one for my Mini. As soon as they arrived I installed the ones in the large and the small, storing the one for the Mini for about two months. Today I went to install the one for the Mini and found to my consternation I had ordered the incorrect stem diameter. It was the correct length (2.5 in) but the diameter was too large to go through the dome hole in the Mini. I called Jeniffer at BBQ Bonanza and she immediately said, “Just send it back and we will see that you get the one you need”. Now mind you, it was my mistake.
If you are looking for a Tel-Tru thermometer, or three, I would suggest looking up BBQ Bonanza at http://www.kck.com/old_smokey/bbq_temperature_gauge_barbecue_grill_smoker_thermometer.html
And, THANK you Ross for turning me on to these people.
Disclaimer: I have no connection with BBQ Bonanza. just a very satisfied customer.