I got it from these guys (although I bought it from their ebay store):
http://www.1000oaksbarrel.com/
Sealed perfectly and made the best Manhattan I've ever had. Went with a combination of Regan's and Angustora bitters, Vya Sweet Vermouth, Woodford Reserve Bourbon. I know a true Manhattan is made with Rye but I was serving to a bourbon loving crowd. We did some blind taste tests with identically mixed non-aged versions and it was simple to pick out the winner.
Heard from a friend that he did a barrel-aged Negroni that also turned out great. Looking forward to my next excuse to make 2 liters of a cocktail...