The Plumber's Choice 2-1/4 in. Bathroom Sink Drain Strainer Basket Replacement for Utility, Laundry, RV, and Lavatory Sinks Chrome 2PPBS - The Home Depot
Danco 2.25-in Stainless Steel Rust Resistant Strainer in the Kitchen Sink Strainers & Strainer Baskets department at Lowes.com