Pella 350 sliding glass doors missing keeper

Good evening. I purchased a set of Pella 350 sliding glass doors. The keeper on the frame is missing. This is a picture of the lock on the door. It has 2 latches which are close to each other. The screw holes on the lock are 9 inches (center to center). The total length of the lock is 9 and a half inches. The holes on the frame for the keeper are 6 inches center to center.
Please help me match the keeper that I need for the frame.

Thank you.