I think Tejas is dead and the Indian aeronautics industry with, at least for the next twenty years, that everyone knows it but that nobody accepts it in your country.
In the long run, you will have no choice. It is EITHER the construction of a stable industrial base, OR an increase in squadron capacity through off-the-shelf purchases.
But both in the short term, it's just impossible. If you want to keep your IAF re-equipment, you'll have to buy off the shelf, build and assemble under license, and acquire the skills that will allow you to relaunch a national program later. But here, the Tejas as an aircraft is very largely obsolete. It's a pity because the Kaveri would have had a good potential, possibly on a twin engine.