Indian Rupee Symbol was finalized a few days back. The new font is used the Devnagiri letter Ra (र) and Roman letter R. This design is done by IIT post-graduate Udaya Kumar.
Now to How to get the new Indian rupee symbol font
1. Go to the Foradian Technologies page here
2. Download and install the font
3. Select the font to Type grave acent symbol (`) symbol on the Tilda (~) just above the Tab key
Here is a video on how to get the font