Where in USA can be bought iPhone 5 Modell A1429 GSM

Hi,

I am the next 4 weeks in USA and therefore I will miss the iPhone launch in the country i live.

I do not want to wait till my return trip to buy the new iPhone and so I would like to buy an iPhone 5 Model A1429 GSM (European LTE-compatible version) in the USA.

As I understand there are 3 models available:

- Modell A1428 GSM (US LTE-compatible)

- Modell A1429 CDMA

- Modell A1429 GSM (European LTE-compatible

Are these Model available in the Apple Stores and are they unlocked (SIMLock-free)?

Or is into the Modell A1429 both tecnologies integrated CDMA and GSM?

Thanks for any answears.