Goble's Gun and Tackle in Ontario is a Canadian distributor for Baikal Canada and they carry the SxS Artemida. The fellow I've exchanged a few emails there with says he has a 30-06 coming in, but the 45-70's are still a ways off: late summer or longer (you can read that as who knows, if ever.)

http://www.goblesgunandtackle.com/BaikalGuns.html

Baikal Canada told me the 30-06's were, in fact, available, so perhaps it's true... They have a long list of distributors on their site.

http://www.baikalcanada.com/

I told the fellow I would take the 30-06: if it ever shows up I'll put in a full report. The price listed is a lot higher than hoped $1100.00 CND (around 935 US) but I'm tired of waiting.