Hi Tim,
You might find it useful to check out the forum of the Register of Ex-Military Land Rovers, here is a direct link to the section on the FC101, http://remlr.com/forum/index.php?board=27.0 It is an Australian specific forum, a number of 101's served in the Australian military as part of the Rapier missile system as well as a few ex-British 101's that have been imported by collectors, I know of one ambulance as it was at the Corowa Swim-In this year. Worth joining the forum, they are helpful guys on there.
regards, Richard