Mystic Seaport's Forebitter has several good CDs out, well performed and researched (Geoff Kaufman is a member of that group). Other favorites are Don Sinetti, Bob Webb, Bob Walser, Louis Killen, Tom Lewis.

If you like the original versions of things, check out Salty Dick's Uncensored Sailor Songs.

There's a good amount of material out there. Have fun.

Jerry