Hi,
Airports Authority of India(AAI) has uploaded all the AIP charts of aerodromes under it control to it's website www.aai.aero. These AIP has airport charts of major domestic airports and general information about minor ones.
Can be useful for FS purposes as well.
This is the link :
http://www.aai.aero/public_notices/AIP_INDIA_MAIN.jspCheers
Shivendra