how do i get Dead Orbit emblems

topic so i can't do my Dead Orbit exotic quest because i don't have an emblem but have everything else the seller doesn't sell emblems so idk what to do i had an emblem a long time ago but sold it because i needed space and now it's not in my collections and in the collection list it says i have to purchase the emblems from the Dead Orbit guy but he doesn't sell so yeah...