What if the inauthentic product is made by my mate dodgy Dave who got a load of cheap milk and some dirty old metalwork, it's ok he flushed a load of industrial cleaner through them and it's good stuff they use it to clean engines at his brother's garage...
You'd be far better off not buying a prestige product and getting a good quality cheese from a reputable manufacturer at a price that doesn't include a huge markup due to perceived historic significance