India is not really the crock it was, there are some damn good agents there, who can in exceptional circumstances obtain permits in 48 hours. As a taster check out
overflight services, flight instructions services, aircraft fueling services,flight planning services, post flight services india They are ISO 9001 certificated.
PS They are my chums so I admit to being biased, just a taster
Another is Trans Asian Avtn run by one Satya Sharma. Again Satya is a good chum
and excellent service provider check
www.jetops.com
Have fun.