Where can I get a fiber optics Broad Radio in the licence free band?

My company has a fiber optics network in two cites but now want to extend service to a third city without fiber network at the moment. We need an urgent solution so streamline as to have the same speed and throughput as fiber optics. The distance between sites is 5Km. Can any one out there advice me or direct me on where to get a licence exempt Broadband radio that has the same features as an optical fiber?