MR816 power supply humming

I’ve recently discovered that my power supply for the MR816 is humming /buzzing. Is there a replacement for these? I haven’t been able to find one searching on line.

Thanks

I’m also interested in finding a new power supply.

https://www.studiospares.com/Cables-Leads/Mains-Distribution/Yamaha-PA30-Power-Supply-UK-plug-version_703124.htm