Two ways AFAIK.
- Change the container to whatever is available in your copy of Blender.
This is what Troy has been doing in his testing_imagery
repo, most EXRs in that repo were re-encoded to Linear BT.709 I-D65.
- Add those “footage container” spaces to the OCIO config used by Blender.
This is how I imported this one encoded in ARRI LogC4:
And how I managed to use Alexa 35’s view transform in Blender, which requires ARRI LogC4.