Had to go by Lee Valley today and noticed a little hand held dust blower. Only $4 so I didn't expect much but considering it comes with four AA batteries I figured it was worth the risk. I won't call the air it puts out a gail but it will remove dust from a negative. At least so far I'll see how long it lasts. It's made in China so I'm guessing your local tool pusher will have something similar if not the exact same thing.