Nilfisk-ALTO  and the  M Class washable PET filter.

These filters are supplied in a set of 2. To clean them, first brush away dust and then vacuum clean each pleat, rinse off with water and allow to dry overnight or in the sun.

At the moment, standard postage is capped at a maximum of $25 within Australia, so maximise the saving on postage and buy something in the related parts below!