Get it directly from here (122MB).
If it fails to install normally, try the manual method (this is for the 64bit version):
1. In the zip file, open: Payloads -> AdobeCameraRaw8.0All-x64-091114042808 -> Assets1_1.zip,
2. Extract the file "1002", and rename it to "Camera Raw.8bi"
3. For Photoshop CC:
Copy "Camera Raw.8bi" to "C:\Program Files\Common Files\Adobe\Plug-Ins\CC\File Formats\"
(overwrite the existing file or rename the original and paste the new one).
4. That's it, cheers!