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By any criteria, the Bf-109 was a STEN fighter, with ease of production and low parts count being foremost in the decision to make it the prime Luftwaffe single-seater fighter.
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Premise here being: other countries, capable for producing aircraft, produce Bf 109 for their and friendly countries. Candidates mostly being France, USA, UK, USSR, Japan, Italy, Kingdom of Yugoslavia, Sweden, Romania. Engines being either loacaly-produced V12s, or V12s from import, perhaps even a suitable radial, in vein of the Twin Wasp-powered Bf 109 prototype.
Both licensed and non-licensed production of Bf 109 can apply.