No. We're not working on any update of current Ref 9 circuit board.
In fact, for recent 2006 shipment of Ref 9, we no longer place the "Version 9.02" label under the amp. If you have the 2006 production date on the serial number, it is version 9.02 by default.
Existing Ref series amps can upgrade to next generation circuit board if we have any breakthrough. Don't ask about availability as we don't discuss our R&D plan.