Heh. I can see all the threads starting with "i searched some threads" from now on...
http://www.bimmer.info/forum/showthr...ght=ngk+copper
Where to get them from? Find out what you need, then call your local autoparts store, then dealer, and anywhere else. Do what you should do when comparison shopping.
BTW your sig is super tall I resized mine so it doesn't take up 20% of the page when viewing heh. I think the only one exempt from this is Winfred.