Based on this product's specifications, here are some alternatives and similar models
Mounting bracket ATEN Rack mount kit for The Secure KVM 2/4-Port Single Display 1U
Summary description:
The ATEN Rack mount kit is designed for the Secure KVM 2/4-Port Single Display (1U) models. It features a durable black finish and is compatible with various models including CS1844, CS1842, CS1942DP, and more. Weighing only 270 g, it is lightweight yet sturdy, making installation easy. The package dimensions are compact, ensuring it fits well in your setup. This mounting bracket is an essential accessory for organizing your workspace efficiently.