Yes, they do sell them, however like most of their merchandise they rotate in and out. Check with customer service and they may be able to tell you when they will be in stock again.
I have never seen them in store.
We do sell them in the store but just in the fall. Check online.
Online only.
I don't know if they sell them in the store, but they do have them online at Costco.com.
Thanks! Your answer is awaiting moderation.