I think 💠the best way is to go directly to the Apple store at the Mission Viejo Mall. They have everything you want and will answer all your questions.
Configure the phone you want on apple.com. bottoms left under pick up gives availability for your local store and has the link to see availability in other stores
What Aaron H. Said here would make the easiest way to find out without needing to go to the store.
Other than going into the mall or calling I don't believe there is any other way.
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