Searching for descendents of RCAF crew

Jon sent me a link to a Toronto Star article about a planned monument to the (mostly Canadian) crew of a bomber which crashed on Ilkley Moor in Yorkshire in 1944:

The Canadians on the plane were:

— Pilot Donald George (Mac) McLeod, pilot officer RCAF. Service number J/87657. Age 21. Son of John and Agnes McLeod of Waterford, Ont.

— Air Bomber Robert Henry (Bob) Rahn, sergeant RCAF. Service number R/155420. Age 22. Son of Jacob B. and Edith G. Rahn of Waterloo, Ont. Service record shows his address before recruitment as RR 4 Kitchener, Ont.

— Navigator Lewis (Lew) Riggs, WO11 RCAF. Service number R/148524. Age 20. Son of Walter and Maude M. Riggs of Toronto. Service record shows his address before recruitment as 308 Wellesley Street, Toronto.

— Wireless Operator/Air Gunner William George (Bill) King, WO1 RCAF. Service number R/93560. Age 27. Son of John and Margaret King of Teepee Creek, Alta.

— Air Gunner (Tail) George Ed Martin, sergeant RCAF. Service number R/163413. Age 21. Son of George G. and Nesta E. Martin of Spanish, Ont. Service record shows his address before recruitment as 116 Atlas Avenue, Toronto.

— Air Gunner (Mid-upper) Albert Lorne Mullen, sergeant RCAF. Service number R/192035. Age 19. Son of John Leslie and Ether Brown Mullen of Burnaby, B.C.

All are buried in Stonefall Cemetery in Harrogate, England, where there are 665 graves dedicated to Canadian airmen.

Reilly is in the final stages of completing the monument at the crash site in Yorkshire. An unveiling ceremony is planned for Jan. 31, the anniversary of the crash. The monument will include parts from the aircraft excavated from the site.

[. . .]

"I'd love to be able to contact any surviving relatives of the remainder of the crew," said Paul Reilly (email: preilly@blueyonder.co.uk).

"All my efforts so far have drawn a blank other than finding Lorne's brother. It would be fantastic if any of the relatives in Canada, if traced, could be there for the dedication."

The Halifax aircraft, serial number DK185, crashed on Ilkley Moor, West Yorkshire, England, around 5:30 p.m. on Jan. 31, 1944.

Update, 18 November, 2008: There's a post at Peak Wreck Hunters with the correct co-ordinates and a photo of the memorial.