There are a few ways that you can check if your item is available at a store near you!
From the product page, select the size you want, and click the button, and enter your Postcode or Suburb. This will display the nearest stores to you which have stock available.
Also on the product page, once you select your size - just below the "Find In Store" button, a pop-up text will appear showing if the item is available In Store, Online or Out of Stock. You can see this highlighted below:
If you still want to be on the safe side and make sure your items are available in-store, you can contact your nearest store here.