I've raised a ticket against the ror_import and ror_export scripts to load truck files into Blender.
It seems the x,y,z axes in Blender don't line up with the RoR axes after importing.
The exporter makes the reverse translation, so the...
I've had a go at updating the following addon(s) to blender 2.8 and at first glance it seems to work.
I had a look, but I couldn't find a github repository to set up a pull request for.