AC accessories bus

[mrmtox]

In building my layout I'm running out of space on the AC accessories poles of my MRC power source plus two Bachmann small power sources. Can anyone suggest an AC power bus with multiple poles to operate - 10 +  lights on an n scale layout. It would be ideal if I could mount it underneath my table (3/4" plywood). MRC/ Radio Shack? etc.  Thanks for any input!