Buy Roomba 800 and 900 Series HEPA Filter - 3pk from Canada at McHardyvac.com
Filter/Filter Kit Vacuum Cleaner Parts for iRobot Roomba 800 870 890 980 | eBay
Amazon.com - iRobot Authentic Replacement Parts- Roomba 800 and 900 Series Replenishment Kit (3 AeroForce Filters, 2 Spinning Side Brushes, and 1 Set of Multi-Surface Rubber Brushes) -