I always wind up buying the heavy-duty industrial stuff...
Well, industrial is not exactly the right term. Industrial appliances either use blue CEE plugs or really heavy Schuko plugs made out of real black rubber.
The plug you once posted a pic of, the one with the soft white plastic shell is more like a plug for garden tools, your lawnmower cord and light construction stuff. For example I've seen wuite a lot of small sanders refitted with those plugs. I've got only one of them, I got it attched to a string of christmas lights. Boy, that looked weird! Especially since the genius wired it like this: Attach strip connector to light string. Hook up 2 30cm pieces of purple 1,5mm2 solid wire intended for use in conduit to strip connector and connect plug to the plug. Don't even bother to use the plug's strain relief or tape the connection. I refitted the old ungrounded plug that still lay in the box. Otherwise I mostly got used stuff from times long gone, really solid stuff, and new construction grade stuff for lawnmower cord and construction stuff (I do lots of DIY, for floor sanders, rotary hammer and similar appliances you can use a good construction grade heavy rubber extension cord).
