The problem is, exported Mirages were modified to reflect customers demand.
They have bit different consoles and avionics(e.g. Sea Search mode and Exocet, ATLIS II and AS-30L).
I don't know but there must be a established procedure for ARMAT, but if that needs alternative consoles and/or buttons, it can't be done with original S5 RDI cockpit.
It's not easy addition, unlike Kh-66 on mig.