8 ft wide commercial quality sliding door handle and lock

Thanks for reaching out! This patio door handle set reminds me of the 82-005 Surface Mount Sliding Door Handle Assembly. I'm confident this should work for your repairs but you'll need to carefully look over the dimensions to confirm.

There is a chance you may need to replace the keeper as well. This set does come with a compatible keeper.

Alternate image for 82-005

Demonstration of the lock interacting with the included keeper.