I must commend Carl on his statement. It needs to be remembered. Where I worked, when someone said can't be done, I said: we will do it, and by this Thursday. ..and we did. We can not think outside the bottle if we start with "it can't be done." I realize the comment was not literal and was meant to indicate a difficult task. I'm speaking in general.
Now, at the risk of building Carl up too much more and creating a freak monster super poster (FMSP): It seems to me that I remember that the shafts have a "double D" shape and that the levers have the female to that shape. That would mean they can be rotated 180, Sure they may have to be bent or modified but the female portion can be reused if a new lever is designed. This would reverse the action of said shaft relative to said linkage. Maybe that would work, not sure.