Help with identifying correct lock for sliding patio glass doors

Hi there. To start, see our 82-002K. This looks similar to your old box handle set, but includes a lock & key. Just go over the dimensions listed on the product page to see if they match up with your old handle set. You could re-use your old inside pull if it's undamaged, but if you want a new one you could consider something like our 88-002. Let us know what you think.