If you have difficulty finding a blower, try a RV supply. They have several types for the exhaust fans over the stoves. Got one a ways back from a place called Fredsons RV in Santa Ana Ca. Don't know if they're still around. Then all you gotta do is round up a sleeve some washers, nuts, and a bolt. Good luck on your project! Tinkerin is the fun part!
Oh yeah, if you can find the Sam Radding Book of Plans, Vol. 2 has a nice set of plans for a "Vibrostatic" The plans are very easy to follow and it can be built without a full on machine shop!