Canon has issued a product advisory for EOS 7D and EOS 5D Mark II cameras. It offers customers an option to replace the mode dial of these two cameras with a mode dial which can be locked. This is following complaints from people that the mode dial inadvertently moves. This feature is similar to the feature seen in the 60D. This option is available at a cost of 110 USD. I am not sure when it would be offered in India.
I am giving the link to the Canon US page. This page also shows the image and other details.