Peter Purvis hosted of the series and i seem to remember White Rabbit productions produced it. The film tapes back in the 80's were very expensive and it was common for the film to be over written with any new material, so like andy say's its 50/50 you'll get the series. I did speak with Peter Purvis about the series and he gave me a contact name and address, I think his name was John. The bad news was my computer died and i lost this info. It didn't wnat chase Peter because he had already been very helpful. Peter did mention that the production company could/may have a copy of the series but it would not be on VHS or DVD (original tape). My best advice is contact Peter, he does have a website and this is how I made contact. That's it for me and good luck with your investigations.
PS: be very polite when contacting peter - I know others perople have cheesed him off with their demanding information, he told me.