MLV Multi Country Pricing

This app does what is says it will do with one big caveat. It programs the different currencies as VARIANTS. I need to display different prices for different countries independent of currency conversion rates BUT if I have 10 units of an item, I can't afford to allocate portions of this inventory to specific countries. I don't want an item to read that it's sold out in the US just because I allocated 3 units to the US when there are 5 units allocated in the Canadian currency. Need a solution where I can have different prices pulling from the same inventory. Starting to regret investing in Shopify for their limitations. In a global marketplace, features like these are basic needs. Already looking to alternative ecommerce platforms.