Don't buy these. They are switch mode power supplies and they are noisy in 99% of the cases. This is not an audiophile difference, it's so big my mom would hear it.
Something like this is what you are looking for. It's very expensive, I know. You can try to find if you find something that is cheaper on a different website. The only thing you need to look for is a transformer.
Some audiophile equipment uses switching power supplies but they are not Standard ones. They have complicated filters to filter out the noise. You can check out ifi, they produce audiophile power supplies. The only thing you need to look for is that you need 24 V and at least 2 A or 48W.