What about RBE2? With the size of the MKI nose the performance would be impressive.
Would France be willing to provide RBE-2AA details to Russia also? Because the radar codes will be necessary to integrate Russian weapons as well, which will need Russian facilities. That would be the biggest problem with integrating a non-Russian/Indian radar on the MKI. They have to integrate the radar with the aircraft's electrical systems, the new engine and flight test it also, all of this will happen in Russia.
It's not such a problem for LCA or Jaguar because we will be using Western/Indian weapons on them. We haven't reached the point where we can simply throw away our massive inventory of Russian weapons yet.