Sliding Door Handles

These are door handles to sliding glass patio doors in our home, built in 1976. We are missing three (3) handles. However there are no part numbers or any manufacturer name on the pieces I have.

The home is part of a gated community wherein all the homes were built at the same time, in the greater Palm Springs, California, area.

Do you have any idea who made these or if anyone sells replacement parts for them???

The size spacing for screw hole attachment of handles seems ideal. The handle themselves are not the exact same, but if we replaced all of them might just work. If we could find the same handle. It would be ideal as then we only need to replace two or three (2 or 3) rather than all seven (7) door handles.

But thank you very much, it does give "Hope".