I haven't gotten around to doing this yet, but I have experience making wood cutting boards and spoons, as well as various other woodworking things. My plan is to find me a block of wood and use a router to mill out the holes I need, much like a CNC machine would do. And I'm thinking JB Weld to keep the cord in place. But I don't have a specific design in mind. I need to get to my hardware store and see what kind of wood I can find. I don't want to use any of the stuff they sell at Home Depot and Lowes. I want something like walnut or mahogany...something so nice I don't need to stain it, just a nice protective oil coat.
As soon as I get around to this, I'll post updates. I'm buying a table saw tomorrow, and plan to hit up my hardware store for some wood stock for cutting boards. I'll scope out something for this project as well while I'm there. I'm thinking if I can find a 4"x4" block of something, I'll grab that.