Hello,
The latest release of Bradford should work fine with Aruba Instant 6.2.1.0-3.4.x.x. I know of one customer who has this solution implemented, with Bradford being the MAC auth and posture assessment server. Note that there is a specific patch that had to be implemented in Bradford in order for any Radius CoA to work properly, but other than that the modeling in Bradford should work properly with the latest release of code.
Please let me know if you have any more specific inquiries on this, and I'll do my best to help out.