I got some from "RedLine Auto Extreme" via eBay - around £15 IIRC. They don't have E9x ones at the moment.
Were OK - just a light smoke, rather than black. Very similar to the ones in the first link. Fitted OK, but they didn't come with plugs - just straight wires. Not an issue for me (apart from trying to stop the wires from going back inside the wings as I was soldering the connectors on!!), so not plug-and-play.
Looks like those on the first link have plugs though.
With being a light smoke, you could see the LED's inside if you looked closely, but it didn't bother me - the smoke looked better against the blue than the standard offering.