Help wanted

A few weeks back one of my Martin Logan Vantage speakers died and my repairer bought the last power supply from ML.  Now the other speaker has died and I suspect it also needs a new power supply. As ML no longer has any has anyone got a power supply for sale or can anyone suggest where one can be sourced. It's unlikely that ML actually manufactured their power supply units so maybe there is an OEM manufacturer who could supply the unit. Any ideas?