Buying a Swiss prepaid SIM at Zurich Airport?

[Sabaton]

Hello guys,

I'll be spending some hours at Kloten Airport next wednesday, waiting for my connecting flight to Johannesburg. I was wondering if there's a possibility to buy a swiss prepaid card in the passenger area of this airport since I want to improve my collection of foreign prepaid cards I've seen that Sunrise and Swisscom outlets are located in the public area, which I won't enter though. I've also noticed that in the passenger area there is a K-Kiosk, don't know if they sell cards. Is some ID-proof required in order to activate a swiss card?

Thanks/Grazie