you can use a steering wheel and gearbox, i do have a g29 and i have tested fgear without problems, there is no forcefeedback though.
there is a sample forcefeedback script in unity version, we could add a similar optional component in the future but we do not want to add external dependencies to the library. may be we can just provide the source code of the component without including in the plugin, we will consider it when the time comes.