You'll probably spend more trying to get the right thing that just getting a nice USB wifi adapter or PCIe wifi card with a normal SMA connector. It's hard to tell from your picture of the original ...

Consisting of three- and six-port parts, the A-lign Series multiport MMCX antenna RF connectors are designed for high-density cable-to-board applications. The PCB-mount coaxial connectors have 5.00-mm ...

Trimmed for plug-n-play use in ISM, satellite, and Wi-Fi applications, the company’s radome antenna assemblies consist of a patch antenna mounted on a ground plane with a pigtail cable to a connector.