Shop-Vac 2-Pack Reusable Large Wet/Dry Shop Vacuum Cartridge Filter in the Shop Vacuum Filters department at Lowes.com
25-1202 Foam Filter Replacement for Stanley 1-5 Gallon Wet/Dry Vacuums, Compatible with Stanley SL18910P-3, SL18130P, SL18133, SL18129 Vacuums (1 Pack) - Amazon.com
Stanley 25-1202 Foam Filter for 1-5 Gallon Wet/Dry Vacuums, Fit for SL18910P-3, SL18130P, SL18133, SL18129, 1-Pack, Black - Shop Wet Dry Vacuums - Amazon.com