Sounds like a 1:192 scale Sterling kit model. Two places you might try are the Floating Drydock ( email at drydock@floating drydock.com) and the Scale Shipyard (www.scaleshipyard.com). The Scale Shipyard has some resin pieces--directors, turrets, 5"mounts, decals, and photo etched sets for that modeletc, and access to some other parts. Floating Drydock has white metal parts in that scale from H-R Products, and other stuff. Good people to deal with in both cases.
Bob