If you're wanting an ANH Vader and need just the lever, I think I have a spare lever from my Parks MPP. You'll need the bolt and pin to hold it but I do have one if you're just looking for just one lever. In fact, if you're going for an ANH Vader, you'll just need a nail and glue the lever onto it.
Like James said before me, if you're wanting an ESB Vader, you can forget the lever; you'll just need the bolt and pin.