A while ago, we replaced our original Eichler garage double sliding doors. (Horrors! - I know.)
Anyway, I would be happy to give away the metal hardware from those doors. Let me know if you are interested. I am in Terra Linda (San Rafael).
For a photos, see this Craigslist link:
(If the link no longer works, that means I've found a taker.)
Update: these parts have now found a home.