Type single fan ada disini !!
https://www.tokopedia.com/breakneck/fan-raspberry-pi Cocok untuk Raspberry Pi Model 3B+ / 3B / Raspberry Pi Dual Fan with Heat Sink Ultimate Double Cooling Fans Cooler Optional for Raspberry Pi 3 Model B+ amp; 3B Introduction : This is the super cooling fan for Raspberry Pi , we provide 2 type for Raspberry Pi 3 Model B and B+ version , please select it as your need. Specification : 1. Size: Raspberry Pi 3 Model B+ Version: 25mm * 56mm * 12mm 2. Voltage: 5V 3. Current: 0.3A 4. Speed: 7500rpm 6. Weight: 40g approx Feature : 1. With 2 cooling fan , it provide the best heat dissipation so the Raspberry Pi will work in a well condition , which help to extend the using life. 2. Easy to install. Just tear up the sticker film and stick on Raspberry Pi board. Package list : 1 x Dual Cooling Fan ( not include Raspberry Pi ) 2 x Heatsink