78 Sqn Halifax 111

Halifax111, LW509, of 78Sqn was lost on the Schweinfurt raid of 24 Feb 1944. I am desperate to contact any of the following members of the crew or their relatives:-
Fg Off C E Melin, RAAF
Fg Off C F Richens
Plt Off D Laver
Sgt K Wiseman, RCAF
Sgt M Bradbury

Thankyou in advance for any help