Did you take the plunge and pick them up?
@camino70 No, I didn't order the complete actuators, I don't think they will fit, and you are probably right that exchanging motors is the best solution.
However, because my locks only malfunction on really hot days (for the last three years), and work fine after the AC has run a few minutes, and because I'm lazy and cheap, I pulled the door panel on one rear door and lubricated the latch and lock cable really well. I used a cable lube for motorcycle cables, with a needle applicator. I've had one hot day and the lubed lock unlocked fine, but the other didn't.
I realize this is only a temporary fix, but it only took 15 minutes, and maybe prolonged the life of my lock motors?
I'll provide more info later, but I do think lubricating that cable is a good idea.