A couple of things wrong with what you're asking. First, ED had modelled a US F-16C Block 50. Even by dropping the USAF and ANG titles, you wouldnt have an International jet. The 50/52+ or Advanced differ externally from the US jets. For one, the extended parabrake housing on the tail for ECM and/or a parachute. Second, most Euro Vipers are MLU F-16As that again are internall the same as the later Block, but externally are different. Plus the weapons aren't all compatible. Some countries weren't cleared for purchase of certain weapons, despite the better airframe.
I do see your point though. The same could be said for the Hornet and F-5E. They specifically built US airframes, albeit with some International systems and skins.