I dont know if this of any help, but the V Force Reunion is being held at Newark Aircraft Musem on 17th May. I know for a fact that a number of Black Buck tanker guys are going to be there, and I am sure there could well be some Vulcan crew members, as well as ground crew who were on Ascension. I'm sure your chaps would be made welcome.
Here's the link to the website
V-Force Reunion