Replacement lock for Andersen 3 door patio set

Need to identify part number for replacement lock on Andersen 3 door patio sliding door set -- lock is between middle sliding section and stationary right door. Information etched below Andersen brand is:
IGCC 306
CII-82S
Here are 2 photos of the lock: photo 1 is the thumb know on the interior of the sliding door, and photo 2 is the back of the thumb latch on the exterior of the sliding door. The thumb panel is 3" long oval on the interior and 5.25" on the exterior with the outside screws about 0.25" from the edges. The lock in photo 2 in the fixed door is 6" long with screws 0.25 inches from the edges.

Over the last several months my attention has been diverted to other matters, but I am still looking for a replacement lock for the patio door and it is now a critical problem given that the property is listed for sale and this repair needs to be made quickly.

Please reopen this case and let me know what is needed.

Maureen

Originally, I sent 3 photos -- the two you show are the front and back of the lock on the moving center door. The 3rd photo (which I am attaching again to this post) is the portion of the lock in the immobile door to the left of the lock.

It seems to me that I may need another part in addition to the two you have recommended to complete the replacement -- especially since the part in the immobile door appears to have a section which has broken off. Please review and let me know. Thanks for your help.

Maureen