Eventide Staff
Can you post a link to an example or give me a song title with min:sec of the sound you're looking for. I have a copy of Loveless, if it's on that record. I can give it my best shot when I get a chance.
Also, have you done any research into the gear he used at the time to do it? I think I've seen this question on various forums on the interwebs before, I think that information is available.
Russ