I have bought both from Germany and ebay. Ebay is the best price by far but hit or miss on make and model. Also, the ebay sellers refuse to ship to canada, so I have them sent to a friend in the lower 48 who shipped them to me. When you search ebay, make sure it's .com not .ca.
What firearm are they for? They are an amazing grip, both in function and presentation. If you haven't owned a pair you will thoroughly impressed