I offer a plastic copy of the stock Sterling B15F search light, called "B15F Search Light". That is one clunky light!
This UPGRADE version is based on the "Mile Ray" lights installed on real Chris*Crafts, which have a visible sector gear arrangement, allowing control of elevation as well as rotation, via hand controls and rods from the bridge. Non-functioning here, of course.
This version includes base, yoke, and lamp housing with gear. You'll need to fabricate your own reflector and light bulb mounting, as well as a lens. Also, the yoke and housing can be drilled out to accept pins or screws of your choice.
Material is Shapeways' Frosted Ultra Detail; see my general instructions for working with this material. "Chroming" should be done with Alclad II chrome paint.