Lost key for this sliding door

Hey there. These keyed handles are also uniquely keyed, so I am afraid we don't have a key that will automatically work with your existing handle set. You could replace the key lock with the 82-310. This comes with a new pair of keys. The guide below explains how to do this. You also might be able to get a locksmith to re-key the lock with 82-322 key blanks. See what you think.

Guide: Legacy Patio Door Handles, Locks & Spindles