sliding interior lock mechanism

A home owner from South Lyon Mi 48178 says:
September 7, 2020
I have two door walls. I do not know who the manufacturer is. Doorwalls are not marked. Doorwalls installed as part of new home construction about 2000-2001. I'm the second home owner. I've been told the manufacturer is possibly Peerless [Canada?] or Permanent Windows. DW1 is the interior doorwall lock...notice the interior 'claw' like lock that latches to the post DW3 when the door handle is engaged. The claws move upward to engage the posts. DW2 is the interior lock frame without the 'claw' which unfortunately fell to the bottom of the doorwall while I was trying to make an adjustment. I'm looking for new or replacement doorwall lock mechanisms for both doorwalls. Can you assist?
Thumbnail of the uploaded file named dw1.jpg
Thumbnail of the uploaded file named DW2.jpg
Thumbnail of the uploaded file named DW3.jpg
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Bob from SWISCO responded:
September 10, 2020

The handle set looks like our 82-078. Unfortunately, the mortise lock used with this handle set is no longer available, and I'm not sure if it can be found anywhere. Sometimes you can get lucky on eBay or a similar site. I am sorry we can't be of more help, and good luck with the repair. 
A home owner from South Lyon Mi 48178 says:
September 10, 2020
thank you for prompt reply
Sliding Door Handle Set, 6-9/16"
Sliding Door Handle Set, 6-9/16"
82-078
$67.87
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