those are not bulgarians.
from the left to right:
1. armour from Dubrovnik (Ragusa) reconstruction based on statue of Orlando
2. armour of Hrvoje Vukcic Hrvatinic (from west Bosnia) reconstruction based on illumination in "Hrvojev Misal", and bascinet helmet from Maglaj fortress.
3. archer from central Bosnia, reconstruction based on several reliefs on "stecak" tomb stones.
im 100% procent sure about that. but images are really good, if you have more post them. they will be useful for Bosnian faction.