In theory we can acquire up to 12 squadrons from France + UAE + Greece but that requires France to get rid of almost all their mirages. Which barring economic collapse, they won't.
Realistically, we can acquire 1 to 1.5 squadrons from France, their oldest batch of mirage-2000 that they decided not to upgrade to the F5 standard ( latest standard), along with approx 2 squadrons from UAE and 1 from Greece. Though UAE number is at best going to be 1 squadron because i read somewhere recently that they are selling 1 squadron to Morocco.
Nobody is gonna 'throw in' Mirage-2000 as a sweetener deal, especially because Mirage-2000 is STILL one of the best bang for your buck plane in the world today - it has exceptionally low maintaiance costs ( fyi i know from IAF insiders that 1 Mig-29 = 3 Mirage-2000 in upkeep cost), is a heavy payload delivery single seater and has always lived up in tough, hardy conditions better than an F16 has.
Its basically your reliable trusty ambassador taxi that no one wants to get rid of because it is so damn reliable and cheap to maintain.
So the only acquisition pathway, is through nations that are slated to phase them out due to more modern acquisitions. Such as Greece and UAE getting more F-35s/Rafales and de-comissioning their Mirage-2000s.
France doesn't wanna give us a lot of their mirage-2000 basically because Dassault is worried that if we take too much Mirage-2000, then our Rafale orders will only be the M version for the navy and that means only 40-50 birds at max.
But i suspect that if India does order another 70+ Rafales (which is likely - the rumour is that India is gonna activate its option of another 36 from the original order option and order another 40-odd M variant for the navy), then Dassault will drop its objection to the French Air Force selling us a few more squadrons of Mirage-2000s.
I suspect actually that if things work out, India will keep the Mirage-2000 flying well into the 2040s, because of new emergent low intensity threats in our region : from Myanmar being a civil war zone to Bangladesh going kanglu-way.
These are bringing up scenarios of potential conflict where you need amriki style 'bomb the rag tag barbarians from the air because their best air defence is an assault rifle' and this is where a hardy, high lift, low maintainance khataara ( which the Mirage-2000 isnt today, but will be by late 2030s) is the ideal tool and doesnt require exposure of the much more expensive to maintain and fly Rafale/Tejas/MKI.