Nilfisk GD1010 and the Nilfisk GD1005 and the Nilfisk Family 5 litre barrel vacuum cleaner and the Nilfisk Business 10 litre commercial vacuum cleaner top cover with screws. This is the part under the handle, (Part Number 12001200). It has the screws in it and the square recess where the HEPA filter sits.
At the moment, standard postage within Australia is capped at a maximum of $20! Maximise the saving on postage and buy several Puregiene toilet rolls a box of Tissues and some soap or maybe some packets of dustbags, or a hose or a new floor tool, or some other accessories!