OK, Mike. Here is the answer, maybe? The folks you talked to were confused, apparently. My curiosity was triggered and that is never tolerated so I, too called Woodcraft. Had to go through several people to get an answer that made sense. Can't say that it is correct, but it makes sense...at least sort of.
Turns out that the bushings are "NOT" the same. The bushing for the Wall Street III is stock #147478 and the bushing for the Wall Street II is #146597.
Where the confusion comes in is that Woodcraft describes the bushing for the Wall Street III kit as being for the Wall Street II Tropical Island Series and while the TIS has the Wall Street II name attached to it, it is actually a Wall Street III kit. Interesting to know, I am going to have to add that that choice tidbit to my pen chart,