You no longer need to go back to Oribos to buy Marks of Honor in Dragonflight!
Honor Quartermaster Seltherex located in Valdrakken 44 37 at the Gladiator’s Refuge sells Orboreal Distinguishment. The bag costs 2,000 Honor and contains 5 Marks of Honor. Previously, players had to visit Oribos and buy the bag from the Shadowlands Honor Quartermaster.
Marks of Honor are used to unlock cosmetic PvP set and weapon appearances.