If you want to pick it up in person, call one of the closer gunstores to ask if they've got any.....Al Simmons in Hamilton and Ellwood Epps around Orillia come immediately to mind.
To order one, you can try Tradeex, one of the sites sponsors, and proabaly a couple other places out West like Frontier Taxidermy or maybe Wolverine Supplies (also sponsors). Cabelas (formerly SIR) lists them, but my last experience with them was horrible. I got two rifles shipped to me in poorly packaged box, which resulted in one of the rifles arrriving with a cracked stock.... and that's only a small part of the hastles I had to go through with that order.
If you check previous threads, I think that some of the carbines came with mags that were somewhat crudely plugged in comparison to others, but that aside they should all be pretty good shooters. If collecting is your main motivation, you might have to pay a bit more for all matching or original (as opposed to arsenal refinished) specimens.
The one rifle that I've tried at the range shot nicely, though I'm glad that I picked up an SKS sight adjustment tool (which incidentally comes with the Tradeex rifles), as it helped to adjust an otherwise low shooting rifle to POA.
I also recommend picking up at least one or two cases of ammo, since once the current shipment's sold off, it's not clear whether we'll be getting more surplus from the Czech Republic. Further to places like Al Simmons or Elwood Epps, I've seen it on sale at Lebaron's and Silverdale range (you want to avoid mail order if you can, on account of the weight). At about $225 for 1140 rounds, that's the cheapest centrefire shooting you can get.
Regards,
Frank