Is it possible to have a multi-chassis VIPRION cluster to further increase throughput?

Is it possible to have a multi-chassis VIPRION cluster to further increase throughput? Is it supported? I am trying to design a APM-based remote access TLS VPN solution supporting 200,000 concurrent users providing 100Mbps of bandwidth to each user. As a result, it will need to support 20Tbps of bulk crypto. Since each VIPRION 4450 Blade is limited to a maximum of 80 Gbps of bulk crypto, I calculate that this would require 250 VIPRION 4450 Blades in parallel. Since each VIPRION 4800 Chassis only supports a maximum of 8 VIPRION 4450 Blade, this will exceed the limitations of a single VIPRION 4800 Chassis cluster solution. Therefore, it is possible to have a multi-chassis VIPRION cluster?