If nobody comes along with a specific suggestion, here's how to select a power brick for any device:
Measure the socket on the back. All barrel connectors measure in mm. Sometimes you can get an adapter but getting the right size is better.
Check the device for an input voltage sticker. Your brick should be within +/- 5%. Modern electronics are supposed to correct for variance up to 10% so 5% gives you some flexibility with a margin of safety remaining. So generally a 19.6v brick would work fine for a device marked as 19v, etc.
Get a brick with minimum the amperage you need. If it's rated in watts and the voltage is slightly different you can calculate amps, dividing watts by volts (since watts = volts * amps). Extra amperage is OK but not enough and something could get damaged.
According to what Welsh Whoopee has posted previously the supplementary brick is 19v 9.5a 5.5x2.5mm but you should double check.
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