projector beam headlamps

[doogie480]

Where do I go to buy projector beam headlamps? I am trying to build them into a non existent pocket. I need to remain somewhat small and everything I look at is already attached to a whole bunch of molded parts that will be tossed out anyway. I would like to buy them with nothing else attached.
Is there anyplace that sells the lens(magnifier) and bulb in a unit that can be mounted to a (homemade) bracket so I can design and install it myself?