I just called my local shop for the 71589-96 and he said it was changed to the 71589-96A and that he could still order it for 37.75.
So, the part you want it still out there at a decent price.
J&P Cycles has the entire switch assembly, not just start/stop, for around 50.00. Might be worth it to change them all out if one went bad.
Very late reply, but I was googling the part and found your post.