Given you've had 2 fail already, I'd just get a higher-spec'd replacement. All I can find out about it online is that it's a 24V DC 'lump-in-line'....I hate those things and used to build my own power supplies to replace them for my sound-studio gear...they are all low-spec junk IMHO, made as close to component-tolerance as possible just to turn them out cheap.
If you don't mind cutting the plug off, you could use something off amazon..just type in "24V DC power supply" and find one that has a slightly higher current rating than the unit you're replacing and read the reviews.