1/4" x 5/8" OD, EPDM Rubber Washers, (100 Pack) Neoprene, 3/32" Thickness - Choose Size, by Bolt Dropper, Neoprene Washers : Amazon.ca: Tools & Home Improvement
Hawkeng 8mm (M8) Medium Rubber Spacers Standoff Washers Shore A 69 (10 Pack) 4 x 15mm, 4 x 10mm, 2 x 5mmm – Black : Amazon.ca: Tools & Home Improvement
1/2" ID Thick Rubber Washers 1" OD 1/8" Thick Various Package Sizes Available | eBay
Hillman 1/2-in x 2-1/4-in Dia. Rubber Washer | Lowe's Canada
10mm ID Oil Resistant Rubber Washers 20mm OD 3mm Thick Various Package Sizes | eBay
1-7/8-in ID x 2-11/16-in OD Dia. Universal Rubber Flat Washer | Lowe's Canada