I don’t think Airbus will cooperate in integrating or certifying any indigenous mods for A2A MRTT aircraft especially when they have their own product. The only reason they may help with the NETRA MK2 or the a330 based AWACS is that they don’t have their own competing product in this segment.
Boeing did something like this when Israeli Aerospace Industries(IAI) started a 767 conversion program to make them tankers but Boeing refused to certify or provide any help as they had their own KC 46 Pegasus based on the 767 and only Colombia and Brazil took the IAI offer despite great interest from others.
Domestic firm Israel Aerospace Industries had planned to convert second-hand Boeing 767 aircraft into aerial refuelers.
www.thedrive.com
Only solution I see is either take the French offer of the next Rafale batch with the tankers included and order few more tankers or the airframes required for the DRDO AWACS in place of the AS 565 Panthers they are offering .
Or develop our own Cargo aircraft for replacing the IL 76 flee and add whatever the fuck we want to it, in conjunction with Embraer or Antonov like the Chinese.