Ok, here is a patch created using mq. I have a problem, however. I managed to solve following situation:

try:
    raise ImportError('failed import' module_name='somemodule')
except ImportError as e:
    print(e.module_name)

that would print somemodule.

However, I can't pass kwargs to ImportError_init from load_next. If someone could instruct me, how this can be achieved, I'll be happy to do that.