Based on this product's specifications, here are some alternatives and similar models
Wall Mounting Bracket DeLOCK Echo Dot 3rd Generation
Summary description:
The DeLOCK Wall Mounting Bracket for Echo Dot 3rd Generation is designed for wall placement. Made from durable plastic, it comes in black and blue colors. Dimensions: Height 57 mm, Width 109 mm, Depth 109 mm. The package includes 1 piece, making it easy to install and save space in your home.