Actually just spotted this here
store.open-electronics.org/inde … =NTC104LAF
NTC thermistor 100 kohm indicated for the measurement of temperatures up to 250 ° C. Ideal for detecting the temperature of the heating section of a 3D printer or a heated plate. Sensitivity: 4066K, thermal coefficient: 4.5% / ° C, dimensions (mm): 1.8 x 3.6 diameter, length terminals: 28 mm.
Wonder if Maplin have such a beast ?