If it is the inlet screen for the pump, I think it is NLA. I was looking for the same one a few months back. I don't have one. I was told that it wasn't necessary. The thread is here: http://www.bmw2002faq.com/component/option,com_forum/Itemid,57/page,viewtopic/t,360369/highlight,inlet+screen/
Hope this helps a little!