This is my fathers business. So of course I'm very positive but hear me out.
My father is one of those shopkeepers that studies his wares very closely to help his customers make informed decisions.
The things he knows about, and can tell you LOTS of information on, are dance shoes, theatrical makeup, and as much as a man can - dance wear.
In addition he's a really nice guy. Check out his shop, and his website (I host it for him) at: http://costume-corner.com
Or just give him a call at 510 222 9200
Oh and the shop has thousands of adult costumes that can be rented too, so its lots of fun just to check the place out.