You could always build one using routerboard and components.
Several Mikrotik vendors have their own custom solutions like these, so you might go shop some of their sites.
A omnitik is a great antenna, i have currently 260 of them in production .
at the moment there is for me no need to have a AC version, first i need to upgrade some links to AC for that
i use omnitik only for routing , client access and backup link.
I agree with you. In fact I do not need an equivalent. My problem is the 2-3 seconds cuts between Omnitik and all SXT clients every few minutes (seconds some times). I don’t know how to solve the problem … and I am desperate.
I changed the hardware, I tried with all frequencies, etc. and I can not solve.
I thought maybe another model equivalent antenna does not have that problem, because I don’t have this problem with SXT SA5