I wish demo crews and their production got a larger spotlight than they currently do. I work with ~80 devs and most are surprised and mindblown when i show them some demo.
If you haven't already, check out https://pouet.net/ . It's almost certainly got the demos that you're interested in.
Now, remembering the titles of these demos might be another matter, but there are people who might be able to help with that too. Do you remember some scenes/effects from the demos that you were interested in?
