just wondering whether I can plug in a 2nd sensor/camera to my existing dk2 set up to get better tracking out of the whole thing and if yes is any advise where to find them?
tried amazon/ebay etc no luck there ( UK seller/website prefered)
Not possible - the DK2 only supports one sensor. If what Oculus told me is true (when I RMA'd my DK2), the sensor which came with your DK2 is paired to that device alone and another sensor will not work with that device.