Well, you are going to have to look pretty hard. There are likely more carriers than there are rifles according to the database of the Cdn Firearms Center.
http://www.canada.com/ottawacitizen/...fire/form.html
The link above (for as long as it works) will take you to a database that a reporter at the Ottawa Citizen got through freedom of information requests from the RCMP/Firearms center.
Anyway. a search for privately owned (individual) Boys, Boyes, RBmk1, and Inglis in the make or model search fields reveals there are only around 33 or so (registered) Boys rifles in Canada.
You can also search for such exotic guns as Brens, stens, Vickers, etc. It is actually surprising how few of these guns (registered) still exist in this country.