latch for inside of door

We have Andersen sliding glass Silver Line doors and the inside latch is broken. My husband saw a number on the door that was WTPD271, but I'm not sure this is the door model number or not. This sliding door does have a lock from the outside of the door. If you need additional information, please let us know.

Thanks.

Lauren (and John) M

Please Note:

The part that is broken is the locking lever and the retainer ring.

Thanks.

John