Some stores may be able to hold one until you can get there, but most stores cannot due to item popularity. The only other option you would have would be to place an order for in store pick up, which will then pull the item off the shelf (if it's available to begin with), and wait for you to get to the store. It usually takes 45 minutes to an hour for an instore pick up item to be ready, and then you have up to 7 days to pick the item up before the order is cancelled.
Also, with the item showing as available then not being, depending on the store, sometimes the employees don't even know. What I would do if I were you would be to talk to someone in that particular department, rather than just ask whoever picks up the phone. And be ready with the SKU number, so you can make sure that they're looking up the EXACT item you're wanting.
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Don't take what I say as being absolute. There's always room for improvement.
