Based on this product's specifications, here are some alternatives and similar models
Riser PCIe x16 DeLOCK 89105
Summary description:
The DeLOCK Riser PCIe x16 adapter is designed for internal use in PCs. It features a PCIe host interface and a PCIe output interface, ensuring high-speed connectivity. With a 1U form factor, it is ideal for compact setups. This adapter allows for the expansion of PCIe slots, making it perfect for adding additional graphics cards or other PCIe devices. Its wired connectivity ensures stable performance, making it a reliable choice for PC enthusiasts.