At NAB 2016, we talked with Pete Smith at VisionSmith for an overview of their new ReLamp LED bulbs. With these, you can convert your old Arri or Mole-Richardson tungsten fresnel lights to LED at a fraction of the price of most of the current fresnel LED instruments on the market. Your fresnel still focuses just like with the halogen bulbs and the CRI for the daylight balanced bulb is 93, and for the tungsten balanced bulb is 98.
Looks like they're not available just yet, but I'm planning to buy one and review it once they become available.