Sliding door replacement lock

We unfortunately don't sell a keyed handle set that matches the design you show here. However, your mortise appears to match our 82-226. This is very commonly paired with our 82-030 handle, so this may be worth considering. The design is very different from your original, but as long as the hole spacing is the same at 3-15/16" then I think it's a good pick. We also sell the key lock separately, under our 82-310.