And...
45 Sq used to visit 13th BS at Clark AFB on Ex 'Joss Stick'. Ceylon was one of the desitnations for 'Lone Rangers'. Suggests that Beeayeate's thoughts about zapping are spot on.
So getting back to CC's original question...
1. Yes, there was a Canberra squadron called the 'Grim Reapers' in the late 1950s; it was just that it was a USAF unit with B-57Bs.
2. Yes, it was, in a way, a special unit at the end of its time on Canberras - it flew the night-attack, LLLTV-equipped B-57Gs, dropping PW1.