Sliding glass door lock replacement

A quick learner from New Mexico says:
September 16, 2020
We have a door from the late 1950's that has a broken mortise lock. I can't find a replacement to fit the mortise holes which are about 4 1/8". The holes on the handles are 4 1/4". Do you have a universal fit set that would work in it? Thanks, Chris
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Bob from SWISCO responded:
September 21, 2020

This looks a bit like our 82-063, but this is a surface-mount handle set (i.e. didn't use an internal mortise lock). I'm not sure what mortise lock would work here; it may be something no longer made. Without seeing it I can't be certain. Otherwise, I'd consider seeing if you could use a newer style surface mount handle set on this door, like our 82-005. You'd have to drill new holes to install it, but it may be your best option. 
Surface Mount Sliding Door Handle Assembly, 4-15/16"
Surface Mount Sliding Door Handle Assembly, 4-15/16"
82-005
$27.90
Surface Mount Lock Set, Ador HiLite
Surface Mount Lock Set, Ador HiLite
82-063
$36.70
Reversing the thumb lock on the Swisco 82-005 Sliding Door Handle
Reversing the thumb lock on the Swisco 82-005 Sliding Door Handle
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How to Replace a Surface Mount Handle Assembly
How to Replace a Surface Mount Handle Assembly
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