On Best Buy Canada's behalf, it applies to the US as well.
Both sites require 2 searches to get all the results.

For Canada:

Search "Steelbook" & "only at Best Buy"

For US:

Search "Steelbook" & "only @ Best Buy"

Note that Best Buy US requires the "@" character, not sure why or if they did finally correct it.
Using "at" strictly yielded older titles still lingering around at one point.