My coupe automatic door lock doesn't work on drivers side. Therefore my keyless entry doesn't work and it's not communicating with the passenger door. I can't seem to find an actuator for a coupe, so does one even exist? If not, what is the fix for this? Does it require replacing the lock assembly on the coupe? I know there are aftermarket lock actuator methods you can do for cheap, but I'd rather just replace with an OEM or equivelent unit.

The door lock actuator does exist, check infinitipartsonline.com if you want an oem or just head to your local parts house for an aftermarket one.

I would troubleshoot the issue to verify it's the actuator and not just the door switch controller that is actually failed, unplug the actuator, use a digital multimeter, verify you get 5v on two pins (one for lock actuation, one for unlock) and can read no resistance (0 ohms) on the third pin (ground).

Check the FSM for all this info, it has the pin layout for troubleshooting the controller as well.

The only reason I think it is the actuator and not the door lock switch is because the passenger door lock will still lock/unlock when using the door switch on the drivers side. Are you saying it could be a miscommunication on just the drivers side between the switch and actuator and not just the actuator failed?

iirc the door lock signal comes from the BCM and splits to both door switches, it wasn't like the window controls where everything goes through the driver side controls first. Signal passes through the switch (via relay) then to the actuator. There is a schematic in the FSM but it would be easy enough to troubleshoot with a meter at the actuator. If you have the voltage signal then the actuator is broken