Inquiry about Add-on soft-close door mechanism without replacing original lock

I am looking for add-on soft-close door mechanisms that retain the original vehicle door lock. The mechanism must attach to the factory lock and pull the door fully closed, while the original latch continues to provide the final mechanical locking. I need the motor/drive unit and mounting mechanism only, without replacement door locks. The mounting plates should be blank or un-drilled, or fabricated based on the dimensions of my original latches. I can provide photos of the removed lock assemblies, detailed measurements, and mounting-hole spacing if needed. Please also send detailed photos or installation instructions showing how your mechanism fixes to the factory lock. Thank you.