Finally got hold of the new slipper clutch, that is stock on the 2015 KTM Duke 390. Its about 7000 INR including installation at the KTM service station, The cost of the clutch assembly is 5834 INR, rest is installation and oil top up cost.
There is quite a lot of difference in the way the bike responds now. Its much smoother and shifts quicker. Downshifting is much faster with this upgrade. Totally worth the cost.
It took us about 45 days to get it to the dealership on order, the delay must be coz its a new part and just launched with the new bike. I would definitely recommend it to the KTM enthusiasts.