I think a Utilikey probably would work, if you like I can check tomorrow as my boss has a broken one on his desk that he still hasn't got round to replacing

They're decent for what they are but they certainly aren't heavy duty. The little arm that goes over the top broke on both mine and his.
What sort of functions are you after? The problem is something like a Shard won't fit because it's curved. A Piranha would be too long even if you put a blaank in the opposite side. A Brewzer would probably fit but that doesn't really gain you anything over the Utilikey apart from prying.