SO i have a yellow headlight bulb and housing that is uncracked in any way!!! no stress no splits or anything.
It has the sealed beam bulb with all the adjustments and everything still attached.
Is missing the hardware that bolts the housing to the bike but you already have that.
low beam may work on the bulb, i am not sure. But here is the catch, if you want me to i can remove the sealed beam back of the bulb, drill out the metal housing, and replace it with a modern halogen bulb from the auto store.
Not a great idea for 6v bikes but if you have cDI or a 12v coil this setup should be sweet !!! i did it on my bike with a huge halogen and a bigger headlight (5-3/4") and it is awesome. gets you two bulb options or if you have it like that run high and low beam at the same time.
anyway not sure about the bulb costs as i used one i had around. or if you just want the housing i can take the bulb out, Whatever....
make an offer and we can work it out. housing, both, or housing with a halogen installed.