Gentlemen
In reading your forum I see that you've in the past had at least one special run of Canadian-Legal S&W revolvers made for our market.
If that is still feasible I would like to toss out a few ideas to see what sort of response they might receive.
First off would be for a 4.25" or greater Model 625 45ACP revolver. (or possibly a 45ACP version of their current Model 25 Classic) - this is the biggest hole in the DA revolver market in Canada right now
The second would be for a 4.25" Model 27
S&W lists both of these types in 4" version only
Finally would be a 4.25 or 5" 586