RV Fridge Thermistor Replacement?

Is there a good Thermistor replacement on a Dometic Model# DM2852RBX that isnt gonna be in the $70-$100 range? I've seen some other ones in the $15-$40 range but it doesnt match the fridge model number and I dont really wanna gamble on it even though it looks the same as the original thermistor. 

Thank You!