Super late, but I bought a "coffee thermometer" from Officeworks for 50 cents. Apparently office people weren't crazy about the coffee thermometer idea. I repurposed it for cooking, and although it also caps out at 100, I've never cooked food to 100 inside without the outside being complete charcoal.
I do have a digital one that still has a little prong which is for BBQs and goes up to 150, but it takes about 30 seconds to accurately read the temperature, usually updating a few degrees every 2 seconds or so