Check these out. It's not SAPI-sized (most NIJ plates are LE sized, aka 10x12) and only single-curve. But it weights whopping 5.4lb each... plus 10 year warranty. Most plates I've looked at only have a 6 or 7 year warranty.

https://hrttacticalgear.com/product/...s-armor-plate/

It's slightly above your budget I would pay that extra to shave off 4+ lbs...



Valhalla Tactical