Based on this product's specifications, here are some alternatives and similar models
Rack rail kit QNAP RAIL-E03
Summary description:
The QNAP RAIL-E03 is a grey rack rail kit designed for compatibility with ES2486dc and RAIL-E03 models. It ensures secure mounting and stability for your equipment in a rack environment, facilitating easy installation and maintenance. The durable construction provides long-lasting support, making it an essential accessory for efficient server management.