It's best to buy body armor within Ukraine. Doing so supports their domestic industry and avoids the need to ship it into the country, which is both expensive and time consuming.
Types of Body Armor Needed
Soft armor
covers most of the body, can stop small shrapnel and prevent cuts from terrain and equipment
typically comes in a full body set
Plate carriers
holds replaceable ballistic plates, worn over soft armor
Ballistic plates
hard plate that can stop bullets and larger shrapnel
Helmets
Eye protection
Ukrainian Companies
These are companies that provide high quality body armor in Ukraine.