My cousin's son who just made the Québec Junior team is presently using an old Lakefield. He is, however, looking for an Anschutz, which, I'm told, is the best one. I have seen lefty Anschutz for sale on the net so they did build them at one time.
I understand that Izmash does a biathlon rifle as well.
If you do an internet search with "biathlon canada" you will be able to find the list of provincial organisations. Many have a "for sale" section, you may get lucky. Good luck.
By the way, Lapua makes a dedicated biathlon round which is supposed to be less succeptible to cold. I notice that my regular 22lr rounds will have a substantially different point of impact if the temperature drops too much.
Denis