Replacement Mortise Lock for Sliding Glass door

A handy person from Toronto, Canada says:
I am trying to find a replacement Mortise Lock for my older Sliding Glass door. I don't know the brand of door but the lock as CD8B stamped on the inside. From other posts on your site, someone with the same lock code was referred to part # 82-211. This part does not look the same as mine. In another post, someone had a lock with code CD8A stamped on it. It looked the same as mine and had some similar dimensions. They were referred to part # 82-251.

The following are the dimensions of my lock:
Length of face = 5 1/4"
Width of face = almost 7/8"
Length of screw holes = 4 3/4"
Length of back part that inserts into door = 3 1/4"
Width of back part that inserts into door = almost 11/16"
Width of back part = 5/8"
Depth of back part = 1 5/16"

Can you please let me know if you have a part like this.

Thank you,
User submitted photos of a mortise lock.
Profile picture of Tom
Tom from SWISCO responded:
Hey, Kevin. I agree, the 82-251 looks like the best match. The dimensions seem to match yours as well. I would just double check your measurements just to make sure that they're the same as what we show for the 82-251.
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