You're going to Europe ... right?
In Europe you'll discover the presence of stores like Decathlon and GoSport. They are similar to MEC, but I think the bigger ones have more variety. There's a big Decathlon near the campground we stayed in near Bordeaux, and at least one in Paris ... and many other places.
This is the UK site for Decathlon:
http://www.decathlon.co.uk/
In 2007, Rowan and I met at Heathrow, stayed in London a couple days, took the train down to Dover, crossed the channel, and upon arrival in Dunkerque we swung by the local Decathlon and bought a tent which we used for the rest of that tour, for several other shorter tours, and we carried it on our 8-month tour ... and it is still going.

It is a Quechua, 3-person tent.
You could pick up stuff along the way if you discover you need something.
Now, if you take a look at our Europe 2012 story, and scroll down to Sunday 26 August, I talk about the equipment we used:
http://www.machka.net/RTW_2012/RTW_Europe_Main_2012.htm