I bought a coop and run from a locale feed store. The coop was a chicken cabin from Ware manufacturers. It's..ok for Bantams for the summer. My chickens are in it now. Myt suggestion is to build one, sturdy enough for weather. the prefab coops to me, are just not big enough.
the first post has the link to the one we bought. after assembly, (and research, and input from here) I wouldn't feel right putting only 2 chickens in it. and they claim it can house 4-6.
The locks are cheap, and I'd have to pay more money to buy more locks and re-stabilize all corners, etc. You're better off designing and building yourself. I start this weekend.
Or find a good design and hire someone. with their prices and shipping, you'll come out close to the same, with a MUCH NICER coop.
Remember: 4sg ft of FLOOR SPACE PER CHICKEN. and thats for just the inside, where they're locked up for the night.
Also, I see that you're from Canada and I've heard a couple of people say that those coops just don't stand up to the weather. You'd probably end up having to replace them in a couple of years. Seems better to just bite the bullet and get a better one the first time. Maybe check Craigslist for a better priced coop, or something you could convert?