I found a used 5984 on Ebay for $16.99, & expect delivery soon. It's coming with 1 missing piece, which the seller identified as "the second piece in the right column" :
(http://i.imgur.com/8WpGIYt.png)
If that's correct than it's 30 09 1710 : PlaymoDB Part Info for "Rock Formation, Large, 3 Holes, 3 Clips" (http://playmodb.org/cgi-bin/showpart.pl?partnum=30%2009%201710)
Does anyone have an extra of this or know where I can get it? I haven't called DS yet as I'm out of minutes until next week, so I would also like to know if any of you think DS might have it.
As always, thanks.