I'm keeping my eyes open for a good Monroe stick, too.  The one I have is pretty much shot, the Wico one plays much better.
BTW, do you recognize this replacement?  I have a couple NOS ones, but I'm not really sure what they go in.  They look almost like a Joust stick, but the skinny part on the shaft is too long, for one.  For scale, that's a long Wico stick next to it.  Original Pac maybe, but the actuator is wrong?
You can see on the instruction sheet that says it is 4 1/64" long, but that is from the top of the ball.
