Red Giant's LUT Buddy plugin was not real-time, so I created an exact lookup table from the Technicolor Cinestyle raw data as a Premiere Pro RGB Curves preset (directly edited XML text data). The 16-point curve exactly matches the MGA file (A/B compared and difference compared: no differences visible in PPro).
Unzip the file, then in Premiere Pro, Right-Click on Presets in the Effects windows, then Import Preset, select the downloaded preset and press Open. Drag the RGB Curves for Technicolor (16-point) preset onto your clips shot with Cinestyle. The conversion is GPU accelerated and real-time.