I have what I believe is an original Eichler bathroom light fixture free for anyone who wants it.
It is basically a rectangular glass bar about 36 inches wide by 4 inches high. It uses 6 standard screw in light bulbs. There is some old paint on the edges of the metal frame that mounts to the wall, but it is pretty well hidden by the glass. It came from the bathroom of our master bedroom.
If interested send me a PM. I can email a picture on request.
The light fixture has been taken so is no longer available.