I've made my own on my last 2 boats. I use a driveway marker from any hardware store and badge clips from an office store. Less than $10 and works great!
How do those clips hold in rough water? I'm thinking about doing some foam like Aaron martens does so I can just hook baits/jigs into it.
the clips do really well actually. Especially for bags of plastics and stuff like that. I use them a lot on plastics and hooks or say I'm on a hot bite one day, like a senko, instead of digging for baits each time they are right there at your finger tips.