[Polydamas]

Catalogues are also a good resource. Check out a high-end camping store, or the website of a company selling modern body armour, or one of those shady electronics stores, or one of the endless websites dissecting every handgun for sale in the USA.

Also worth saying: to afficionados, some of the modern armour in High Tech feels a bit optimistic in its protection. The authors chose to round up protection to a full Hit Location rather than either give a chance of attacks striking the unarmoured area or choosing a real-world version which protects a full Hit Location in GURPS. That is one reasonable choice, but its the opposite of the choice which the authors of Low Tech made.