Etherbit (https://store.etherbit.io) is the official and authorized reseller of Ledger wallets in India. Check it yourself here https://www.ledgerwallet.com/retailers or email Ledger Support <support@ledgerwallet.com>.

PS. It is cheaper to buy a Nano S for less than 6k from them in 2-3 days than paying 7k+ (shipping, duty, and taxes) and waiting for 20-25 days.