Nilfisk GA Diffuser Pack Comprises Grill and Blue Pad For Motor Top. Now obsolete and no longer available.
It's also found on the Nilfisk GA72 and GA73.
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 hose, a floor tool or other accessories.
At the moment, standard postage within Australia is capped at a maximum of $20!