Here is a small standalone tool I made with Python to convert albedo and HDRi textures to OCIO color spaces.
AVAILABLE ON GUMROAD >>> https://gumroad.com/l/zlaAs <<<
Added batch process and dark skin
Create suffix according the destination color space
The app is quite easy to use:
First point your config.ocio file to get all the color space settings.
Then select the texture you want to convert and the appropriate color space for your usage.
More info about OpenColorIO: