lock for sliding glass door, 1962

A quick learner from Tupelo, Mississippi says:
Looking for two replacement locks for sliding glass doors built 1962. If cannot find locks, maybe different locks with different handles.
User submitted image of their door hardware.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
Thanks for your patience as we look into this. I'm a little stumped, to be honest. This is a weird one. I'm not sure what the internal locking mechanism looks like. If you can, please send us some photos of that portion along with its dimensions. Also, what is the mounting hole spacing on the handle? Maybe we have a substitute you can use with the same spacing.
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