less hum: switching power supply?

[chris]

hello friends on Synth-Diy !

   i'm usually lurking around here, sorry for the sudden surprise entrance.
   in a quest to totally eliminate the hum in the audio circuits...
   i've decided that switching power supply is the way to go to get rid of 
the big 60-cycle EMF.
   could anyone point me in the direction of a small, lightweight, 
onboard-style switching power module: input 120VAC, output +/-15V @ 500mA, 
+5V @ 1000mA.

christo