BattleSteel Level 4 10x12 Armor Plates Shooters Cut Single-Curve
Battle Steels level IV ballistic plates
botach.com
I have two of these in my JPC. Ya they're Chinese but mrgunsngear did a video on these and they held up great. stopped everything an NIJ level 4 would for a heck of a lot less. Mine are multicurve but I couldn't find it specifically, but this link is a good start though if you want to dig to find it.
