As far as I can tell, the output specs, as @PhilipDAth posted, are DC 54V 1.85A.
The manufacturer of the power supply is Universal Microelectronics Co. Ltd, Taiwan.
This looks suitable - https://uk.rs-online.com/web/p/embedded-switch-mode-power-supplies-smps/7718477/ (caveat, whilst the label says Electrical & Electronic, I'm not Electrical). I usually deal with RS Germany near Frankfurt, they have knowledgeable pre-sales engineers (one of the joys of dealing with German businesses).