I have purchased Canadian and Australian coins there. They had a table at Whitman coin shows 2 years ago, but not last year. Based on first cost and shipping, it can be cheaper to buy from them rather than ship from “Down-Under”. My last purchase required a call due to a back-order situation for my shipment, but Canadian 2011 Polar Bear & 2011 Wolf 1 oz. silver coins arrived in great condition soon after the call. I also purchased past Koala & China Panda silver 1 oz. silver at the whitman show.
Another possibility is CaliforniaNumismaticInvestments.com A buddy of mine raves about their deals, but I have never purchased from them.

I have not checked either site and have no affiliation with either company.