Netflow on Hybid 6509's running CATOS

We have a number of CISCO 6509 running CATOS which supports Netflow version 7 upwards only. I understand that the new version of netflow now supports version 7. However, the licensing of the software is based around number of interfaces monitored. With CATOS each individual port appears as an interface, unlike native mode where VLANs are displayed. My question is is there a license option based on the number of devices monitored as opposed to interface. In my environment I would require One license copy of netflow per 6509!!!
Also, Can you add support for multiple listerner ports in future releases. If a device is very busy and exporting a large number of flows there is a very high risk of losing flows from other exporting devices. Windows does not have a very efficient TCP stack.