Microsoft has finally released the Windows 10 Insider Preview build 14371 and is available for the users who have selected to receive insider builds in Fast Ring and download it right now via Windows Update feature.
At the moment official ISO images of Windows 10 Insider Preview build are not available, but you can create one yourself.
You just need to follow the steps mentioned in upcoming line:
1. Download the official .esd files of Windows 10 Insider Preview build 14371 released by W.Z.T and Dona Sarkar. Check the following tweet for links to download .esd files.
— WZor (@WZorNET) June 22, 2016
2. Once you got the .esd file you need to convert it into ISO image using the following tutorial How to Convert Install.esd file to ISO.
3. Once you got the ISO image, simply create the Bootable Windows 10 USB,
4. Perform a Clean install of Windows 10.
I hope you find it useful and sorry for not sharing ISO images of Windows insider preview build 14671.