I've actually found a place in the UK (well, an online store) that sells 6” x 8” side plates, which I wasn't expecting (and not that I'm expecting to get into any shootouts any time soon anyway
I'll only list the specs out of respect for forum rules. Basically, I'm saying that If a limey like me can find side plates in Blighty, then there MUST be some NIJ IV side plates available in the good old USA!
Certification:National Institute of Justice 0101.05
Certified Protection Level:NIJ Level IV (ICW SAP's)
Size: 6” x 8”
Individual Plate Weight:kg