What is the cost of level 2 datafeed and from where to get it?

DotEx which is a subsidiary of NSE provides level 2 data feeds with other level feeds also. They have a per annum fee for these service.
you can contact them through nse website or from the bellow address.
DotEx International Ltd.
Exchange Plaza
Plot no. C - 1, Block G
Bandra-Kurla Complex
Bandra (E), Mumbai - 400 051
Telephone: (91 - 22) 26598385
Fax: (91 - 22) 26598120/8384
E-mail: [email protected]