Based on this product's specifications, here are some alternatives and similar models
Interface Card QNAP QXP-T32P
Summary description:
The QNAP QXP-T32P is an internal Thunderbolt 3 interface card designed for NAS and storage servers. It features a PCIe host interface and provides Thunderbolt 3 output. The card supports both full-height and low-profile form factors, making it versatile for various setups. With high-speed data transfer capabilities, it enhances storage performance and connectivity options for your server.