Reading through the Dirtside wargame rules in a bit more detail, and I'm amused by the final chapter, where it lists where all the models and terrain came from that were featured in the photos.

Contact details are addresses (real, physical addresses, not email address), and request an SSAE if you wanted a catalogue to be sent to you.

It was a different time, which I still have vague memories of.

A surprising number of the companies are still around in one form or another.