Kim....
Within a few weeks, if all goes according to plan, Stories of Strength will be in the databases bookstores use to order their inventory. Therefore stores will be able to order it just like they order any other book and the pricing will be set in Canadian funds according to the standard methodology. The store will just put a sticker over the US price printed on the cover.
While it might be tempting to buy some and resell them for what you paid plus shipping, you'll run into the same problem with disparate pricing when the book becomes widely available and is substantially less than what you had to charge for the copies you bought.
Therefore, I recommend you just keep asking bookstores to bring it in once it's available. If they don't want to stock it, ask them to let you put up posters and/or flyers in the bookstore instead to advertize it and entice customers to order it through the store.
ADDENDUM: As far as foreign pricing goes, what I've managed to figure out from Lulu is that we don't manually set whatever price we want in England, and then again in Australia, and then in Canada and on and on. Everything stems from the price we set in the US, and it all happens automatically. When Lulu sells through the retail chain instead of direct, a different pricing formula kicks in and each step on the way to the retail store is linked to this. Therefore, once the book works its way through this process and becomes available in Canada, or England, we'll see the price and that's what it will be across that country.