Amraam hitting MI17 has bigger chances than Su-30, it would be practically impossible for India to hide the same. MI17 images floated in media before even official acceptance.
There was no need for DGISPR to mention that they didn't took down MI17, it's probably to control the war mongering, India also didn't declared it as hit by Pakistan, else they would have been forced to escalate, given the casualties. That's only way they could have got that part of AIM-120, otherwise some missile part falling in some remote corner, that to in winters in kashmir would be next to impossible to get.