Thanks for the replies!  The second tutorial you mentioned that could be modified is actually the tutorial I was thinking of - the moss hanging down must have stuck in my mind and mistakenly filed under 'weeping willow'.    The first post does look pretty good.  I'm not exactly sure what was used for the very end branches that the flock is attached to.  It doesn't look quite like floral wire, but it could be I guess. 

Definitely looks like making one would be a lot of work.  I'm going to do some experimenting at some point - both of those examples help. 

Thanks again!

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