Yea it was great back then. I remember it being a big step up from the old halogen halfords jobby and my little spotlight with a door bell switch on. It gave me the range I needed I get on the mountains after the hares. Gutted the bulb has gone. Sealed unit as well. I did google it and found a few but not the the blue eye.
Saying that just found one in america
https://www.12voltsplus.com/bb-2000-optronics-blueeye-replacement-bulb-for-hb-2002#.XKntyVVKjIV