As promised, I have scanned in all of the manuals that I was given when I picked up my '83 Funlite 16S. I will be posting copies of these in the (I hope) appropriate locations in the forums.
I hope this is of help to someone.
Also, In searching for possible replacements / upgrades, I came across the last file from Parallax (the company that took over from Magnate.
The thumbnails were also found searching online (though I think it's for a 6300 series) but the electronics should be similar unless you have the 3215.