I have what I believe is an original Eichler ceiling light fixture free for anyone who wants it. It came from an Eichler built in 1961 in the Fairbrae division of Sunnyvale.
It is white frosted glass in sort of a pod shape, 9 inches high with a 6 inch maximum diameter. It mounts directly to the ceiling, it does no hang from a cord. It uses a single standard screw-in bulb.
If interested send me a Private Message. If you would like a picture include your email address in the PM.