I'm going to travel from EU to US in a week and I need a plug adapter to charge my phone. But I'm having trouble finding a store that sells US to EU adapters in the city where I live (Riga).
I'm going to have a 2 hour layover in Frankfurt so I'm hoping to purchase an adapter during that time. Are there any stores in the secure area of Frankfurt airport that sell plug adapters? If so, how do I find one?
Note that I don't need to convert frequency or voltage (most phone chargers support 50-60 Hz and 110-220 V).
This is the kind of adapter I'm looking for: