Unique Product Url For Multiple Storefronts

As a brand owner wishing to sell via ecommerce in different countries through our distributors in each country (who would be vendors) the new multiple storefronts feature is a great development. However if we want to create a unique url for each product to sell via instagram for example or when influencers mention our product – how can you have a unique product url that works for all country storefronts so that a follower in Australia goes to product page on .au storefront etc..?