You got the 5-serie e60/e61 facelift version ? http://www.mb-cardesign.nl
Look on this site. And go to the webstore. And you see a facelift version angel-eyes. There are only a bit more expensive than the pre facelift. So it is possible.
If you look on youtube youll find some movies how to take your headlight out.
Those eyebrows are too much work for me. You need to dismantle the complete headlight unit. And then solder some new leds in. Still thnx for the link!