Hello Sarah,
As David said, if he was a member of the R.B.L. there is a possibility that they will hold some details of him. Even if he was not a member, they should be able to provide you with suggestioons of where to try.
Have you tried the Canadian Legion? again, they may be able to help.
Also, if you look at this:-
http://www.vac-acc.gc.ca/remembers/s...eralfaq#obtain
it gives details of how you can obtain service records, but you will need as much details as possible to submit an application.
Paul