I went through the first two films and created as many stereoscopic images as I could, by merging frames from crane shots and truck shots in which the people and objects were essentially motionless. Unfortunately, there aren't very many of these camera shots in the first film, and I was only able to use one single shot, from which I created two slightly different 3D images. The second film has considerably more of these shots, and I was able to create four unique images.
You can view them using classic red-and-blue 3D glasses, which you can still find for cheap online, or, if you don't have glasses, I created autostereograms which you can view by simply crossing your eyes, and superimposing the two images in your field of vision. I desaturated the anaglyph images, because they pop much better in black-and-white, but the color versions look fine as well. So, there are three different versions of each image, and as a bonus I included two shots of my Kenner figures.
SPOOK CENTRAL 1
SPOOK CENTRAL 2
WORLD OF THE PSYCHIC
--- Dr. Venkman (GB1, deleted scene)