Contact John Sheridan of Yankee Modelworks directly.
jrsheridan at yankeemodelworks.com
(replace " at " with @, to keep the spammage to a minimum)
John is a good guy to do business with and can more than likely answer your questions. John can even likely provide mix-n-match to do the Laffey if that is necessary
See too the Laffey page on Navsource
http://www.navsource.org/archives/05/724.htm