Alternative for PTC Thermistor NXP KTY83/122 SOD68 1.02kohm
Suitable alternatives:

NXP KTY81/110,112 Thermistor SOD70 1.01kΩ, 5.2 x 4.2 x 4.8mm (very similar specs, slightly bigger casing)
KTY83-122 silicon temperature sensor (recommended by bldc motor controller supplier/seller)