Hi, I have been looking for Lipos (2s) and a charger, but am unable to find any Indian websites selling.
I need a minimum of 5000mah and 40c.
I have looked at hobbyking, but they only ship through air mail, which I am not comfortable with.

Try the Gens Ace lipos from Joy rising Hobby.

I buy all my lipos from hobbyking. Works out much cheaper if you buy 2 or more at a time. Everyone I  know ships stuff by airmail.

Alternatively you can use two 4400mah 35c or 3 2200mah 35c in parallel (http://www.rcbazaar.com/products/1745-wolfpack-2200mah-35c-74v.aspx) you will get 250amps/200amps max draw.