Catch-up boxes are now available from vendors in the Dragon Isles for M+ and PvP players.
Spinsoa now sells Volcanic Equipment Chest for 250x Flightstones in Loamm, and Calderax sells Obsidian Equipment Chest for 375x Conquest in Valdrakken’s PvP Hub.
The Volcanic Equipment Chest drops items from Dragonflight Mythic dungeons at ilvl398, Adventurer 4/8 track, which means they can be upgraded to a maximum of ilvl411.