US topo is just called Topo, but be forewarned it doesn't autoroute (I understand that Topo Canada does autoroute).
Older copies of the Topo should start showing up on eBay as a newer version is either released or will be released soon, and topo is unlocked.
Okay, bear with me, I'm still learning. I haven't discovered how to autoroute yet, and what does "unlocked" mean?
But thanks for the info on the name, I'll keep my eyes open!