I bought the Nubee Temperature Gun from Amazon for US$13.59 (S$20) together with the Bosch GLM 35 Laser Measure. It also doesn’t ship to Singapore directly, so you have to go through a freight forwarder like HopShopGo.
The Nubee temperature gun is a non-contact digital laser infrared thermometer that lets you obtain a temperature reading of a surface such as stoves, ovens, food and fish tanks.