The links below may point to other sensor versions (SHT40, or SHT41). Double-check that you are buying the specific model you need. Looking for another version of the SHT4X series? You can also buy the SHT40 or SHT41 versions.
Aliexpress - SHT45: I2C Temperature and Humidity Sensor
$6.54
Aliexpress
eBay - SHT45: I2C Temperature and Humidity Sensor
$10.42
eBay
Amazon.com - SHT45: I2C Temperature and Humidity Sensor
$14.99
Amazon.com
Amazon.de - SHT45: I2C Temperature and Humidity Sensor
€14.99
Amazon.de
Amazon.es - SHT45: I2C Temperature and Humidity Sensor
€15.99
Amazon.es
Amazon.co.uk - SHT45: I2C Temperature and Humidity Sensor
£14.99
Amazon.co.uk