FWIW, Bud's Guns has some "new" Model 42's on their web page for sale as of 4 June 2012. I asked where they came from, and was told "from a large distributor who sold his stocks." Price is $535.

Search term to find them on the Bud's page is "150502"

I am not connected with Bud's Guns in any way -- giving them a "plug" here because the happen to have this special Centennial in stock when no one else does (it is discontinued by S&W). My guess is the ones Bud's is selling were made in 2008-2009 or so. I don't know how many they have in inventory -- it could be only one more. I bought one last night. SOLD OUT BY 7 JUNE 2012.