Apple Watch Nike+ Series 3 in stock at Apple Stores

Hello, Folks!

I am interested to buy an Apple Watch Nike+ Series 3 GPS while travelling in Florida, in early December. I wish to know if it's only available at a Nike Stores or if it's easy to find it at Apple Stores. Is there an effective way to check the availability in stores before I go to an Apple Store, since I am not in USA?

I tried to buy an Apple Watch Nike+ in last January and Apple Store Florida Mall didn't have it in stock, so I wish I don't take the risk next time.

Thank you in advance!

Sincerely,

Marcelo