Based on this product's specifications, here are some alternatives and similar models
Rackmount Kit for Cisco 1100 Series Router, model CCA-404-2M, 2U mounting
Summary description:
Rackmount kit CCA-404-2M for Cisco 1100 Series routers provides a 2U-compatible mounting solution for installing the router into standard server racks. Designed to secure the Cisco 1100 Series device in a rack environment, it enables organized deployment in data centers, branch offices and network closets where rack installation is required.