You would need to drill or cut pass-through holes, but you could just use 2" X 3" or 2" X 2" black slotted wiring duct attached to a blank plate.
Panduit, Hellermann-Tyton, and others available in black.
Unsure on the finger spacing.
TB A+ Partner Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense. -Buddha
