Emu XL-7 & MP-7 User's Group

Dear Group,
I'm recently joined to this group, Brian Grassfield from Hungary here. I bought an XL-7 just few days ago, and now I'm in love. :) Just like everyone here, as I read.
My XL-7 is near as new, no wears or scratches and all controllers are really mint condition. The only one problem is heating of the PSU. I can't measure it exactly, but it warming to around 50 degrees of Celsius as I felt. 
Additional info: I used it to lay on a bed or my legs, so these are not ideal conditions for success cooling, but cmon... I'm afraid that capacitors will dry up and than a shortcircuit comes...
My question is that how I can buy a replacement and how could be identified that it will fit on my gear?

Thanks and have a nice day!