First the bad news, I don't have a spare.
The good news is, when I was first faffing around with one of these rather good boards, I decided to install a momentary switch for the clear-flash pads. this is mounted under the top plate of the main enclosure. Very easy access but no chance of an accidental press.
The second board was flash and forget so no switch installed on that one.
Second one is in my main DAC and the first is in a headphone/pre-amp/DAC.
Both have had their power supplies split and upgraded.