Here is a video of browsing the site with the wayback machine.
These are all the screencaps I still have of the original official Silent Hill 1 website:
SH1 Questionnaire
Here is a cool postcard questionnaire I had that came with one of my copies:
SH1 Ads
Magazine ad:
SH1 Japan Demo
I also have a copy of this Japanese SH1 demo disc:
I still need to find my scans of other demos and things! I have several magazines in a box.