Below are some excellent resources for finding equipment.
Horse Bows - Importing from Hungary: traditional bows and archery equipment of Turkey, Mongolia, the Magyar people, and other horse archers of the steppes.
RenBoots - Renaissance, cavalier, medieval, knight, musketeer and ankle boots, medieval shoes.
ongolian Naming Conventions - This page documents the current usage of Mongolian language names, and romanization of those names in Wikipedia.