There's a small article about the 52' MLB's in the Spring 2002 issue of Model Ship Journal and it has pictures and plans for MBL-52312 (Victory). (see: www.modelshipjournal.com)
It's a great magazine w/ 4 issues a year. It always has an article or two about the Coast Guard. They also have plans and lots of photos. A subscription costs $35/year and a catalog of plans of photos costs $10. I have no affiliation w/ the magazine and am just a very satisifed customer.