Below you will find a comparative table with our Advantennas:
Some of the antenna holders (p33 and p16) can be mounted using standard 1/4" material.
Some examples being:
https://www.amazon.es/aluminio-universal-Zice-proyector-capacidad/dp/B06Y1LK7LL/ref=asc_df_B06Y1LK7LL/
https://www.amazon.es/Soporte-Camara-Montaje-Antioxidante-Station/dp/B07Y532Z13/ref=asc_df_B07Y532Z13/
https://www.amazon.es/Olisicht-Soporte-Proyector-Techo-Aluminio/dp/B0716T3JQQ/ref=pd_sbs_107_4/262-4186404-9845162