Firewall as a Service.

Are there any vendors that have hardware firewalls and maintain their own Openstack nova/neutron driver set? I’m looking for something that I can offer to my VPS customers as a self-managed service. At the moment, I’m using the default firewall driver. Which is nothing but a wrapper for iptables; and while seamless, I can’t imagine it’s going to scale very well. I’m looking for something that has 10 gig client connectivity and either 100G or 40G uplinks. -Daniel