Based on this product's specifications, here are some alternatives and similar models
Omni-directional antenna DeLOCK 12433
Summary description:
The DeLOCK 12433 is an omni-directional antenna with a gain of 6.5 dBi and a 360° horizontal beam width. It features a 50 Ω impedance and vertical polarization, making it ideal for various wireless applications. With dimensions of 210 mm width, 295 mm depth, and 63 mm height, this antenna is designed for easy installation and optimal performance in diverse environments.