I've never seen this one before. I hate to admit that I don't think I've even heard of it.
You can find the first season on region 1 DVD here in North America (all seasons are out in the UK). Far as i know the series was never shown in the US but i think it was shown in Canada but since the series is from the mid 70's it's hard to tell where it's been shown over the last 30 years.Show is full of the groovy 70's style and fashion. :)
Couldn't agree more Drake, still one of my all time favorites!