Mike, this is about it for Manhattan...
48th St. between 6th and 7th aves is the main block of music stores. Here you'll find Manny's, which has the most vintage drums of any store I've found. Occasional Black Beauties, wood Dynasonics, etc. Very, very expensive.
Due south on 46th St. is Drummer's World (you have to look up to see the flag). I've seen an original Gladstone here. Ask to see the 60's Camcos in back.
On 8th ave between 38th and 39th St is Nodar Rode's place (he's moved.) Hundreds of vintage snares and drums, many of them recut. You have to call him to get an appointment first. www.nodarrode.com
That's all I can think of for now...have fun, and pm if you need any help.
Quick edit: directory of NYC music stores...a couple years old as Manhattan Drum shop is now closed, but the rest looks good.
http://www.raveny.com/music/manhattan/index.htm