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Did you measure voltages (pin 1 of regulator, 470uF cap)?
Voltage controller may still be damaged... as well as 470uF cap (at the output of the regulator circuit) could be shorted inside (check with multimeter).
Once you establish what went wrong, regulator chip and caps could be obtained from RS-components, Element14, ebay...
Regulator chip will be very hard to remove from Brent's board without damage (it has a large soldering pad for cooling, which is soldered to PCB, so a lot of heat needs to be applied to remove it - the best way to do it is using heat gun.
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