Petr's Violin Shop, The Music Man and Alaska Music and Sound are open again! They want to help you keep your money local. :)
Shar Music is where I order most of my music supplies from if I don't get them locally. They are fast and reliable and have sheet music as well.
Southwest Strings and Johnson Strings are still available for supply/music orders, as well.
For hard copy sheet music, try JW Pepper (they sometimes have e-print available, too). If you want to hear a recording of any of our pieces, this is also a good place to try!
Amazon also sells supplies (please never buy an instrument there, though!).