RIDGID Wet Application Foam Filter for 3 to 4.5 Gallon RIDGID Wet/Dry Shop Vacuums VF3700 - The Home Depot
RIDGID Wet Application Foam Filter for Most 5 Gallon and Larger RIDGID Wet/Dry Shop Vacuums VF7000 - The Home Depot
Amazon.com: ALL PARTS ETC. Foam Sleeve for Shop Vac 90585, Washable Foam Filter Replacements for Shop Vac - Also Compatible with Ridgid, Craftsman, Vac Master and Other Similar Wet Dry Vacs :
Shop-Vac® Foam Sleeve | Shop-Vac Store
Amazon.com: ALL PARTS ETC. Foam Filter Sleeve for Shop Vac including 3 Dry Filters, 1 Foam Sleeve, and 1 Mounting Band - Compatible with Shop Vac, Ridgid, Craftsman and Other Similar Wet