My Garmin Nuvi 200w Only Came With A Us Map. Where Can I Download The Canada Map?
It looks like your only option would be to look into getting the full City Navigator NT North America. You will may be able to find a way to download it for use in the mapsource program (not legal), but as it requires unlock codes that are unique to your GPS unit, I doubt that you will be able to find a downloadable version that you can transfer to your GPS.
Your best bet would be to contact Garmin Support and they can give you the legal options that your 200w would support.