There's a "Download" button for their open models literally two clicks away from the homepage.
Click "Learn more" under the big "Committing to open models" heading on the homepage. Then, because their deeplinking is bad, click "Open" in the toggle at the top. There's your download link.
Click "Learn more" under the big "Committing to open models" heading on the homepage. Then, because their deeplinking is bad, click "Open" in the toggle at the top. There's your download link.