A SAAF Mirage F.CZ “gunned down” a Angolan Mig 23MF in Mid 1987.
A French Etandard “gunned down” a Yugosalv MI-8 in March 1999.
It is possible (but I don’t know for sure) that a Ethiopian Sukhoi Su-27 may have “gunned down” down a Eritrean Mig-29 in May 2000.
Peruvian Air Force Cessna A-37B “Gunned Down” down a private Cessna 185 in April 2001 (does this count?)