Not with Cisco mics. You will need 3rd-party microphones and an external DSP. There are a lot of hardware OEMs in this space but three common options are Shure, Sennheiser, and Biamp. I suggest engaging an A/V reseller who has audio engineers to design, install, and program the gear.
PS- The original Room Kit was meant for small to medium rooms where the farthest viewer is within 16 feet of the camera. A room needing 6-8 mics is probably too large for that codec.