Not sure if this is what you're after but we wanted something similar and just recently bought a dust buster from Target, Black and Decker, and it was vacuum like attachments that make it more like a mini vacuum than a dust buster. Has a vacuum head attachment, long arm, brush attachment, rechargable... I quite like it. It's on special lol.

There were also bigger dust buster/vacuums, upright, that you could look at...? Some were a lot smaller than an ordinary vacuum, but a little larger than your average dust buster.