I assume you're familiar with Andy Slack's article on the Covert Security Bureau in White Dwarf 41 (and don't miss the connection with the Star Patrol in in White Dwarf 20). In the same issue, The Snowbird Mystery, also by Andy Slack, is an adventure using the CSB. (Now, wasn't that an adventure I played in an excellent Dom Mooney run thing at TravCon a long time back. I think it might have been though I forget the details except that I believe we were knighted by Margaret herself at the end!)
See also The Imperial Secret Service by Robert McMahon in White Dwarf 27
Space-Age
Espionage by John Dunkelberg in Dragon 120 (XI, 11), and
Traveller Variant 1: IBIS by Kenneth Burke in Dragon 35 (IV, 9)
Another adventure for characters playing CSB agents can be found in White Dwarf no.62 An Alien Werewolf in
London by Jae Campbell.
JTAS 23 has The Birthday Plot by Keith Douglas with the Ine Givar attempting an assasination.
Merc Tickets by Magnus Abel in Between Worlds 2 has a Striker battalion level ticket protecting a CEO against an Ine Givar attack.
and an 8 October 2013 editorial from Loren Wiseman looked at the development of the Ine Givar amongst other things (but I've only done a few Online JTAS articles so do NOT consider this resource searched and I've not bought it with me on holiday - but it looks as if David J in another email may have that covered).
As ever, this is just a quick search of my bibliographies and should not be taken as exhaustive, but I hope it's helpful.
cheers
tc