I have a decent Sci-Fi and Horror collection as well. Most were taped from AMC when they first started and commercial free. Others I've picked here and taped there. (Just picked up a DVD transfer of Robinson Crusoe on Mars...love it!)
One of my favorites was shown on PBS many years ago at like 2AM...Somehow I managed to tape. I never heard of it nor saw it again...I'll have to dig it up and give you the name. Was a trilogy of creepy vignettes.
Remember Creature Feature and Chiller Theater?
Anyway, I'll keep my eyes opened for you....
Can ask here as well:
http://www.askmehelpdesk.com/forumdisplay.php?f=329&page=5&order=desc