Based on this product's specifications, here are some alternatives and similar models
Band Spigen AMP06490 for Smartwatch — Black Stainless Steel, 25.9 mm x 191 mm x 6 mm
Summary description:
Replacement band Spigen AMP06490 is a stainless steel accessory designed for smartwatches. Finished in black, it measures 25.9 mm width, 191 mm length and 6 mm thickness. Supplied as a single piece, the band attaches to compatible smartwatch models to provide a durable metal alternative to silicone or leather straps for daily wear and formal occasions.