Thanks for the input, guys. I am partly trying to differentiate as to whether the noise I notice is due to strut wear or the worn rubber. I am certain there IS some strut wear because I can feel a minute amount of vertical play in the front wheels when shaking them while the suspension is under load. However, I also feel they are working fairly normally, else I wouldn't likely see the strut mount movement I do when I bounce the fender ( i.e. there is resistance to small displacement - no freeplay from leakage).
If I can think of a better test, I'll try it, and report back.