Convert/Trade non-zone USBUIRT for Zoned?

Is there any way to convert my non-zone capable usbuirt to a zone capable model?
I bought mine before they had this ability (no 'Z' after serial #), and am getting a second cable box hooked up this weekend, so I'd like to be able to control it.
Am I SOL?
Follow up question: Any one want to trade, or buy mine?
I bought mine before they had this ability (no 'Z' after serial #), and am getting a second cable box hooked up this weekend, so I'd like to be able to control it.
Am I SOL?
Follow up question: Any one want to trade, or buy mine?