Well, I'm not much help here seeing how I've got mostly IGH bikes, but I do have this if it's any help. It was pulled off a Raleigh Sprite that's being converted to a SA AW. It looks pretty low end to me. What that said, I know little about derailleurs and what I do know, I'm desperately trying to forget!

I believe it will clean up pretty nicely. If you want it, it's yours for the asking.
Suntour - 1 by
Sallad Rialb, on Flickr
Suntour - 2 by
Sallad Rialb, on Flickr
Suntour - 3 by
Sallad Rialb, on Flickr