There are several companies that provide military aircraft to the US Gov't for dissimilar ACM. There's a company that owns several Kfir's, a guy in Florida who own a Hind, and a MIL-17, a company out of AZ that owns or owned a few A-4's. Then there's the company around that flies LJ35's as a weapons test platform and radar target. Get the Gov't contract w the purchase of the F-5, and I'm sure you'll find yourself warmly welcomed in the restricted areas and warning areas by a bunch of blood thirsty Viper, Rhino, Eagle, Hornet, or Raptor drivers.
Then, after they promptly and swiftly hand you your hiney, you can high-tail it home at Mach 1.2, or whatever you can wring out of that F-5.