The Coast Guard Acquisition Directorate (CG-9) has published a list, in pdf format, of the companies that have expressed an interest in the Offshore Patrol Cutter (OPC) project.
They list nine shipbuilders: AUSTAL, Bath Iron Works, Bollinger, Marinette Marine, Nassco, Northrop Grumman Shipbuilding, Todd Pacific Shipyards, and VT Halter Marine, Inc.
The complete list including contact information is available here.
Chuck Hill's CG Blog 
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Not sure what part of NGSB might bid maybe their composite group?
Austal, MMC and Halter Marine lead my list
you might run spell check again
Thanks, Lee, I just cut and pasted and didn’t check the spelling.