NEED A CURRENCY EXTENSION FOR CANADA??

So far have been unable to find an extension that provides Canadian currency?? We are developing a website that will offer products in either US dollars or CANADIAN dollars for the customer to choose......can anyone steer me to a Canadian currency extension? Thanks.

What's wrong with the built in one? Just add CAD to your currencies and the selector on the front page will show USD and CAD

DUH!!...sorry...didn't realize that it was built-in, thought you had to purchase as an additional extension. Documentation doesn't readily spell out that you can enter any currency required? Thanks for that!!