If you are having troubles finding 9mm target ammo in sufficient quantities, SurplusAmmo.com has PMC 9mm FMJ 115gr ammunition in stock by the case. Price as of 3/27 is $450 per 2000 (2 1Krd cases): click.
There are other types there by the case and half-case as well. Such as steel-cased Sellier & Bellot, for $105 per 500rds (steel cased) 9mm FMJ 115gr. Remington UMC "green" box 9mm FMJ 115gr for $250 per 1000rd case. Winchester 9mm FMJ "encapsulated" 147gr in 1000rd cases.
PMC is of South Korean manufacture.