2013 update: I've just bought a new load of these from my local hardware shop. I have always preferred these to brown (or other coloured) plugs, particularly for long screws or where a heavyweight item needs a secure fixing.
I don't see why the length is an objection - they take up...
I had the same requirement (or compulsion :D) as the OP, found this thread and picked up 2-off Ashley 10A fan switches (quite cheaply from eBay) as suggested.
I found that, with care, the black fan and double circle markings can be polished off. I used Cerium Oxide polishing powder, which I...