Additional i2c yun

I have a project which will use a host if sensors hook up via i2c, the problem is I am using the same module mounted in different places on the box. The sensors I am using have fixed i2c address , I am looking at different sensors. I was wondering if/how it would be possible to create a s/w i2c driver which would give me to i2c buses.

Not sure if this would be possible or the complexity involved