Bungie did not add them into any other loot pools (such as post-game drops) and haven't given any indication that they plan on doing it any other way now other than the seasonal kiosk. So, to obtain the 3 Episode pass weapon catalysts from The Final Shape and the Third Iteration catalyst from Reclamation you will need to own their relevant passes by purchasing them from the kiosk for ~600 silver each. Echoes pass -> Red Death Catalyst, Revenant pass -> Alethonym Catalyst, Heresy pass -> Lodestar Catalyst, Reclamation pass -> Third Iteration Catalyst If you plan on purchasing Year of Prophecy or Year of Prophecy Ultimate Edition, you would want to avoid buying the Reclamation pass as both of those editions include it.