Dan:
I will make a separate "shout out" post in case you don't check back in here.
This website below lists Rougier Friar's Balsam 100Ml and if you click on "Buy Now" it gives the price in USD and the shipping in USD.
Doesn't USD = US Dollars? I have not actually tried to purchase from there, but it sounds like you can from this website.
Twice now I have gotten the 50 swabs on Ebay for $14, including shipping.
http://www.canadadrugcenter.com/rougier-friars-balsam.xhtml