Based on this product's specifications, here are some alternatives and similar models
Antenna DELOCK 2.4 GHz I-PEX MHF® I plug omnidirectional 2–3 dBi with 15 cm FPC cable for internal adhesive mounting
Summary description:
DELOCK 2.4 GHz WiFi antenna with I-PEX MHF® I plug provides omnidirectional signal coverage with a gain of 2–3 dBi. The compact internal antenna includes a 15 cm 1.13 mm FPC connection cable and is designed for adhesive mounting inside devices or enclosures. Suitable for improving 2.4 GHz wireless range in routers, gateways, IoT devices and other network equipment where internal installation is required.