Bushkill Bee Vac / Robo-Vachttp://robo.bushkillfarms.com/beekeeping/bee-vac/
Not cheap, but great design and the best out there (in my rookie opinion). Check the link out and see what makes it different from the rest of the vacs out there. My 81 year old mentor was very impressed with the one I got. With some rudimentary equipment and skills you can build one your self. (I didn't think the equipment I had available at the time would do the job and I'm not commenting on my skills
Rob, I never did say thanks for getting the vac shipped on out to me quick. Thanks!