Is there a street map of Silverymoon, one with every street and alley named?
I cannot find one in public domain. However looking at:
There is a link on there for Roads in Silverymoon, with a large printout and some time you might be able to get most major roads annotated. Every alley, I'm not sure about, as alleys are not always named in such settings. Cannot find reference to say that it's ever been fully mapped out cannonically.