Keeney Plumber's Spec 3.5-in Stainless Steel Rust Resistant Strainer with Lock Mount Included in the Kitchen Sink Strainers & Strainer Baskets department at Lowes.com
HAYWARD, Eastar, Single, Basket Strainer - 3CDZ5|SBC100STE132 - Grainger
Simplex or Single Basket Strainer – PT INAKO PERSADA