https://www.amazon.com/ARCTIC-Breeze-Mobile-Flexible-Adjustable/dp/B003XN24GY/ref=sr_1_1?ie=UTF8&qid=1514223021&sr=8-1&keywords=arctic+breeze+usb+fan

This should do the trick. A bunch of people (myself included) have this and it works great. In the meantime, I believe it is not recommended to run your 2pac above 100 freq until you have a fan on it but I would check just to be sure.