Hello,
Not a V-mount, but I would say "Omnicharge Ultimate" or any other variant.
It would provide lots of power, either when pluging the Chronos Original charger, or with a pre-set power output.
with the Omnicharge you can set your own voltage output, but Beware and know what you are doing.
for added security, you could take your best multimeter and compare the power Voltage output and polarity at the barrel tip of the original Chronos Charger, with the output of the Omnicharge, and once you are in range, you are safe.