It might also be worth getting in touch with the Air Gunners' Association. They will likely have some of the information you are looking for.
Their web address is:
http://www.spiraldive.co.uk/airgunners.htm
There is also a book of memorial at RAF Cosford (in the Chaplaincy Centre) where the names of those who died both in the war and since are recorded.
Hope you are able to get the details you're looking for.