Sure, it's not problem.

We did this in our old Carat a few years ago. IIRC, the manual regulators are the same for all years. It's a simple remove and replace deal, although getting the old power regulator out was a pain the first time. Make sure you get all the parts, including the plastic guides, for the manual ones -- removing it yourself makes sense.

You'll need a set of manual door panels and can then offer your power ones to someone in need.

john