Ok, here you are
Choppers - the Early Years, Choppers - The Workhorses and Choppers -The Helicopter at War
all published by DD Video, 5 Chruchill court, 58 station road North Harrow Middx HA2 7SA but you can probably get them from a large video shop or amazon.co.uk if they are still around. Again, there is some boring nonsense in all three, but some of the original footage and interviews with the pioneeers are just amazing.