It's about time I actually posted on this forum. I'm glad I found it in the first place, by the way. Thanks to what I found here I bought a second hand Cyclamatic Power Plus on ebay. I'm very pleased with it overall. All I've had to do so far is to bypass the ignition switch which seems to have failed. I've also added a 52T crank from ebay, which makes it a good bit quicker, at least on the flat or downhill.
http://www.ebay.co.uk/itm/130957470204?_trksid=p2060778.m1438.l2649&ssPageName=STRK:MEBIDX:IT
http://www.ebay.co.uk/itm/130957470204?_trksid=p2060778.m1438.l2649&ssPageName=STRK:MEBIDX:IT