rear spoiler under diving boards

[E30 Wagen]

I really want to get one bad. Should I be patient and wait for one to be on ebay, or are there easier ways of locating them? I don't know where to look on the internet, or if they have a specific name, or whatever... Are they expensive OEM parts? I'm confuzzed.

[Dave]

Racing Dynamics made one, as did Zender. Both are kind of hard to find, though they do show up here and on eBay every once in a while.

[fporro]

there's a Zender on ebay right now !