I took apart my Dr door panel this weekend to see what the deal was with my lock and it looks like a PITA to get to wear gloves for sure I couldn't really see much but it almost looked like it was attached to the latch assembly as well. I didn't even see any other hardware so I am hoping that there are studs on the inside. I am not sure about the rear door but I have 3 that seem to be worn out. I am making a trip this weekend too for the same thing, hopefully some one will chime in with a better answer.
Jeff