What Voltage Regulators Do I Get?
7815/7915 are standard parts. They're +15 and -15V regulators.

Every manufacturer has their own version with different letters... Like KA7815, LM7815, etc...

These things are total bog standard and compatible, so pick the one from the closest shop and solder it in.

Then, maybe there was a reason why they burned... and maybe the new ones will burn too... but they're so cheap, you can do the test.