Nilfisk GB933 3 phase industrial vacuum cleaner and the Nilfisk GB1033 3 phase industrial vacuum cleaner shaker kit, it fits in the side, just off centre of the machine and shakes the filter cage from side to side.
As it's light, maximise the saving on postage and buy some of the related parts below, such as dustbags and other filters or a new floor tool or other accessories.
At the moment, standard postage within Australia is capped at a maximum of $20!