This was a tough rubber cone tapering to a small hole at the end. It's usually used on the Nilfisk and Tellus GM80 commercial vacuum cleaner in an industrial situation, such as cleaning out electrical equipment.
It's no longer available, so use Pn. 81141101 and cut the hooked end off it, as can be seen in the second photo with the packet in it.
At the moment, standard postage within Australia is capped at a maximum of $20! Maximise the saving on postage and buy some of the related parts below, such as dustbags and floor tool or filters or a new wand or hose.