Not sure if Amazon links are allowed, but:

GDEALER DT09 Waterproof Digital Instant Read Meat Thermometer with 4.6” Folding Probe Calibration Function for Cooking Food Candy, BBQ Grill, Smokers https://www.amazon.com/dp/B077N9T555/ref=cm_sw_r_cp_api_glt_fabc_W52KXN3R9SMF5DC8M883?_encoding=UTF8&psc=1

Not bad for $16. Not as fast as thermapen, but pretty good.