I would think you could fabricate a suitable sucker attachment using your existing shop vac, a PVC nipple, and a length of 3/8" copper tubing.

Do you have a TopSider or Mityvac? You could possibly use them to suck up the crud as well.

WORD OF WARNING: MAF cleaner fumes are most likely flammable. If they get sucked into a vacuum cleaner and come into contact with the sparking brushes in the motor you stand a chance of igniting them. Granted, it's not going to make a rocket engine (like the Mythbusters tried to do) but you could get a nasty surprise if they ignited.