National Geographic can be found in almost any dentist's waiting room in Switzerland.
Seriously, most magazines do international delivery these days. But be prepared for the sticker shock - you'll pay a premium for delivery to Switzelrand.
Even, in some cases, for the online version. Go figure.
Since you haven't listed your location I can't help you with where you can 'rent' magazines... but many libraries in larger towns/cities will have English language magazines available.