Loose Driver Side Inner Door Handle Assembly

[dude]

I just bought a 93 SC400 and the driver side inside door pocket assembly is loose and when you go to close the door with the handle it bends and feels like it is ready to fall off. I tried tightening the screw holding it in place under the handle but the screw will not hold. Has anyone had this problem and do you think it is just a matter of buying the new pocket assembly from the dealer and then pulling the inside door off and replacing it. I just thought I would ask around before undertaking removing the inner door since that is no easy task.