@pmdj Unless you need hardware-accelerated packet filtering, You may want to take a look at #Realtek #RTL881x USB WiFi chips.
https://www.varia-store.com/en/produkt/396021-awus036acs-802-11ac-wlan-usb-adapter.html

#AlfaNetworks makes several of those with RP-SMA connectors and even a MIniPCIe card with 4 U.FL connectors on top.
https://www.varia-store.com/en/produkt/189847-awpcie-1900u-802-11ac-ac1900-usb-mini-pcie-adapter.html