MUBI often features The Dreamers in their rotation. Crucially, MUBI usually streams the Unrated International Cut. They are a streaming service for serious film lovers, so they rarely censor.
If you find the "full" version on Archive.org and want to keep it for your offline collection (assuming it is for personal, educational use), here is how: the dreamers 2003 internet archive full
Pro Tip: If you download the MKV file, download VLC Media Player (free) to play it smoothly. Optional assignments: