Based on this product's specifications, here are some alternatives and similar models
Omni-directional antenna DeLOCK 12416
Summary description:
The DeLOCK 12416 is an omni-directional antenna with a gain of 3 dBi, suitable for frequency bands 0.8 - 0.96 GHz and 1.71 - 2.7 GHz. It features a vertical polarization and a 50 Ω impedance. Compact dimensions of 29 mm width, 29 mm depth, and 88.7 mm height make it ideal for various applications. The antenna comes with an SMA connector and is packaged in a polybag, providing convenience and ease of use.