WOW, a bunch of fellow Suntour groupies. Just too add something I forgot to mention in my earlier post; my bike is 20 years old, the bike and the Superbe components all have over 145,000 miles and never had a mechanical breakdown!! In fact when I heard Suntour was going bankrupt, I went down to an LBS and bought a set of Superbe derailleurs and pedals (that's all I had money for at the time and the LBS guy said those parts would be the most likely to break) just in case mine broke! (I was afraid I won't be able to get parts for them). I still have those parts unused in their original boxes.
Here's the only web site that I know of that might be what your looking for:
http://totalbike.com/reference/suntour/