Turbine housings

Are Garrett and Turbonetics turbine housings interchangable? I am looking for a smaller turbine housing for my Garrett T04B. I e-mailed a guy on ebay about one and he said the Turbonetics would work. I don't want to get screwed over. Thanks.

Turbonetics does use a lot of Garrett parts so that is entirely possible. However, I would call Turbonetics and Garrett to double check and make sure they're interchangeable.