Hiyas Doc, if it doesn't necessarily have to be a dial gauge like
I would suggest you just bypass the gauge and jump to the next level which everyone jumps to normally anyway. A remote dual probe thermometer. It do so many things for you, it tells you the chamber temp, the internal meat temp, it has an alram system as well as a timer, etc etc etc.... you can get 'em that respond to a phone app or do digital grapics of you smoke.
Theyrun in price from about 30.00 to about 3 to 400.00? They are normally a steadfast camper and don't break very much. Mine I thought finially gave up the ghost last year (15 years old) but it just needed a new probe....LOL
I don't know but Maverick I think is the most popular. I have a couple of old T-72's, its single probe and the least expensive. I think the new T-733 does everything mine does but with two probes. You can set it once and it remembers what you want and had 10 to preset. Pretty fancy.
Unless you just have to have a dial thermometer, I would probably look at that Maverick T - 733, google it, or check out the AMazin Products sale, 20% off and good people. but I would difinately stick with the new T-733.
Hope it helps.