Coast Guard ships

The Scale Shipyard has fiberglass hulls with plans for the foloowing USCGC's in 1:96th scale: POLAR SEA (WAGB) 50" loa; HAMILTON (378' WHEC) 47" loa; TANEY (327' WHEC) 41" loa; BEAR (270' WMEC) 34" loa; and CHEROKEE (205' WMEC, ex USN ATF) 25" loa.  The also sell resin fittings like watertight doors, hatches, liferafts, etc to detail the model.  Loyalhanna DOckyard carries the fiberglass hulls and plans offered by Coast Guard Models.   CG Models offers quite a few hulls in various scales, including the MACKINAW (WAGB 83); the 83' Patrol Boats from WWII; and several buoy tenders.

By 327 foot class you mean the following?

WPG.31 BIBB CHARLESTON N.Yd 14. 1.37
WPG.32 CAMPBELL PHILIDELPHIA N.Yd 3. 6.36
WPG.33 DUANE PHILIDELPHIA N.Yd 3. 6.36
WPG.34 HAMILTON NEW YORK N.Yd 10.11 36
WPG.35 INGHAM PHILIDELPIA N.Yd 3. 6.36
WPG.36 SPENCER NEW YORK N.Yd 6. 1.37
WPG.37 TANEY PHILIDELPHIA N.Yd 3  6.36

Iron Shipwright makes a the Campbell in her 1943 configuration.

http://www.commanderseries.com/ships_350.html

They also make a Tampa-class as the Modoc (WPG-46) and an Algonquin-class as the Comanche (WPG-76).  They make a Paulding-class destroyer which served with the Coast Guard as Rum Chasers during Prohibition.  Its an easy conversion.  They do a Cedar inland buoy tender and I'm working on mastering a White-class buoy tender in 1:192 scale for them. 

 Moving forward, ISW also makes a modern 378' cutter as the Hamilton (WHEC 715).  I'm working on it now, just hanging all the stuff on the foremast.   Very nice with full decals for the whole class.  Can be made either as pre-FRAM or post-FRAM.

JAG Collective makes a 1:700 scale resin & brass WHEC also.   They also make a Bear medium endurance cutter.