I've got an old Trek 620 touring frame I'm trying to build up for week long trip coming up. I've decided to pickup a Suntour set, but I'm having difficulty figuring out what exactly I'm looking for.

I actually have a Suntour Cyclone set now, but it can only manage doubles. Is there a triple out there, and is there a specific model I should be looking out for?

And while I'm on the topic of triple FD/RD's, is there a good modern set that would match a vintage Trek frame?