mandi dabwali is the marketplace in punjab - haryana border where these jeeps are made. You can pick em up from as lil as 70,000 rs to 1.5 lakhs.
Locally speaking to your area, look for army junk dealers etc, they are the best bet for getting these made.
But remember, these will last about 30,000-50,000 kms, and will rattle all the way till then.