Obvious follow up question: soviet tech is easy to come by, at least the kind that's now used in dozens of countries. How is the missile not designed to be effe

Obvious follow up question: soviet tech is easy to come by, at least the kind that's now used in dozens of countries. How is the missile not designed to be effective against the most likely target? Surely Raytheon must have a dozen versions of Russian and European flare dispensers and not just the US kind?