Am I missing something about Starlit Crystals?

Is there any other way to get them than the 54 you get per day from the Sea of Stars? The new items they added for 1.6 cost 1180 total, and if it's just those 54 per day that's only 1296 total you can earn before the time-limited items go away, leaving only 116 to spend on the permanent shop. The only other place I see to get them is the one-time rewards from the Cloudsea Realm. I know you don't have to buy everything, but it seems really frustrating that Starlit Crystals are so drip-fed and there's no way to exchange any other currency for them.