Based on this product's specifications, here are some alternatives and similar models
Rackmount rail kit CONCEPTRONIC RRK02, 2U, grey, 88×506.2×18.5 mm, 2 pcs
Summary description:
CONCEPTRONIC RRK02 is a 2U rackmount rail kit for secure mounting of equipment in server racks. The kit includes two grey rails with dimensions 88 × 506.2 × 18.5 mm and is designed for standard rack-mount installation. CE and RoHS certified, it comes as a pack of two and suits professional IT, telecom or AV installations where stable rack mounting is required.