I am going to use little canvas bags that can loop over spare cleats for now, and will see how that works. I usually coil my halyard and put beside the jam cleat, and then keep my genoa lines coiled beside me, with the active one around the winch and inactive one seat...when I am really heeled, or chaos happens, lines are on the cockpit sole, but it is just me sailing so never too crowded in cockpit.
However, having yammered on about all that, I know what you mean: a plastic disc with an elastic loop and a ball....divinely simple...you could probably make some really cool ones yourself...
Geeeze, I can go on and on, can't I?! ;D
“You get a boat for only one reason, because you want one. If you’re worried about being practical, forget boats.”