Sure, the Legacy Command Base has the standard Reverse-SMA connector used on a zillion 2.4ghz products.
One suitable one with a base, cable an 9dBi gain.
Bingfu Dual Band WiFi 2.4GHz 5GHz 5.8GHz 9dBi Magnetic Base RP-SMA Male Antenna, $7.99
Edit: correct link to antenna with proper connector!