Licinne Bread Stock

I've recently fallen in love with the Yonsei Cream Bread series,
so I've been trying one of each variety.
I usually reserve them via the app and pick them up at my local CU store.
While I'm at it, I've been checking if they have any Licinne Bread in stock, but they are always sold out. How on earth do you guys find them?
I am located in Gangdong-gu.
There was a time when I used to struggle to find Honey Butter Chips at my regular store, but this is even harder than that lol