In the Japanese version of this game there's an extra car manufacturer in Gemballa that was dropped for the International release probably because of licensing issues, the files are still in the game and swapping the Japanese executable into the Export version while it does glitch out the graphics, makes the Gemballa cars selectable once more, so I'm looking for the toggle to re-enable Gemballa cars in the executable in IDA Pro but found nothing, because I don't really know anything.
I've included the Export and Japanese xbes as well as a WIP build of cxbx-r capable of playing the games since support is still early for the time being if someone wanted to test it for themselves.
V322.xbe in the A folder must be copied to the root folder in order for the game to boot, and it of course needs the Chihiro firmware present and setup in cxbx-r in EmuDisk/Chihiro
Just know that the controls are hardcoded to the keyboard in the wasd area, you must disable card r/w (unless you set up yacardemu which does work) and power steering. F1 and F2 are the service and test keys.
xbes.zip
Cxbx_D3D8I_Rev3.zip