2 X 10dBi RP-SMA High Gain Antennas Dual Band 2.4GHz 5GHz WiFi Antenna Connector Universal Antennas Amplifier WLAN Router Antenna Booster - Newegg.com
DERAPID AC1300 USB WiFi Bluetooth Adapter 1300Mbps Dual Band 2.4Ghz/5Ghz Wireless Network External Receiver Mini USB 3.0 WiFi Card for PC/Laptop/Desktop Compatible with Windows 7/8/10 - Newegg.com
Hiro Inc. HiRO H50355 Dual Band 802.11ac 11ac AC1200 5G 5GHz 867Mbps Wireless WiFi WLAN USB Network Adapter 5dBi Omnidirectional
What to do when the 5GHz band is not appearing as available – MBReviews
ASUS ZenWiFi AC CT8 AC3000 Gigabit Ethernet Tri-band 2.4GHz / 5GHz / 5GHz Wireless Router - Black
Comfast 1200mbps Long Range Dual Band 2.4/5ghz Wireless Wifi Router High Power Wifi Repeater Signal Extender Wlan Wi-fi Amplifer - Routers - AliExpress