Based on this product's specifications, here are some alternatives and similar models
Baking tray Masterclass GB40KCMCHB4 35.5x28x0.5 cm carbon steel grey
Summary description:
Masterclass GB40KCMCHB4 is a double-layer carbon steel baking tray sized 35.5 x 28 x 0.5 cm, designed for even heat distribution thanks to a small air gap between layers. Suitable for heat-sensitive bakes like meringues, biscuits and flapjacks. Rust-resistant, oven-, fridge-, freezer- and dishwasher-safe. Supplied in grey, includes a 20-year guarantee and 5-year non-stick guarantee.