crew of 103 sqn lancaster JB733

On november 8th 2009, we will inaugurate a memorial for the crew of Lancaster JB733 of 103 sqn that crashed in Hallaar (Belgium) in the night of may 11th 1944.
We are searching for more information abt the crewmembers and are also trying to contact relatives of them.

Crew was :

P/O R. Whitley RAF
P/O J.A. Carter RCAF (relatives found)
F/Sgt R.B. Webb RAF (relatives found)
Sgt K.L. Ramage RAF
Sgt J.W. Smith RAF
Sgt P.N. Crutchfield RAF
Sgt K.M. Martin RAF

Is there anyone who can help is in finding relatives of these airmen ? We would like to invite them to the ceremony.

Many thanks in advance

Steven Volckaerts
Merestraat 8
B-3128 Baal
Belgium