[Effendi]

Huawei is the biggest name in the dongles world...
I cannot tell you if any Wind shop in Liguria or Lombardia has the dongle you want, of course the only way to know it is going there and ask.
I live in Liguria (I'm from Genova), I know there are at least 3 Wind shops in Chiavari, about half an hour from Deiva, for example. No problems in Como. In Deiva there's NO 3G coverage with Wind, by the way, and I fear neither EDGE.
As I already wrote, Wind dongles are unlocked, no problem. They always come with a prepaid card, usually with 10 euros of credit, sometimes with more (there are many offers).