Hey Phillip,
Thanks for grabbing the product! So the Bard & Ranger have official releases from the Arcane Library. Can be found on their Discord as well. The Witch, Warlock, & Knight are from The Cursed Scroll Zines, again from Arcane Library. Though the Knight is more generic than their Cursed Knight of St.Ydris. The Shaman has no "official" version, though a number of other talented creators have made Shaman Classes. One in particular being Unnatural Selections.
Cheers,
Daniel.