Mirror plates black: http://www.pinball-dreams.com/index.php?article_id=12&clang=1

Sit down before you scroll down for the price

                              

EDIT:
Just noticed you are in Holland so most of the info below will be redundant.

I talked about this product briefly in this thread:
http://aussiepinball.com/index.php?topic=8141.0


Here is a cut and paste of what I wrote.

"Without going too far off topic you can go even fancier and get coloured mirror polished SS sheets from a place in Sydney called Rimex metals.

http://www.rimexmetals.com.au/StainlessSteelFinishes/ColouredMirrorsSatinsStainlessSteel.html#

I haven't got my measurements handy but you should be able to get half a dozen panels/blades/whatever you want to call them out of one coloured sheet.

They are not cheap though, the quote I got was $468 plus gst plus shipping (fragile and insured) for one coloured sheet. I couldn't find anywhere in SA which stocked it so abandoned the idea.

You can see an example of the black and gold coloured versions at the bottom of this page (note the price):
http://pinballdecals.com/MirrorBladesPage.html"