[E-trademarks] looking for a trade dress case citation

[Carl Oppedahl]

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Looking for any case(s) (TTAB, District Court or Appellate Court) that 
held, in a trade dress case either that:
         1) an element that replicates a conventional functional element 
of an item is/per se/deemed functional and/or cannot be source-identifying;
                     OR
         2) an element that only merely replicates aconventional 
functional element of an item istherefore not functional and/or canbe 
source-identifying.

     For example, consider a computer PC keyboard that is itself 
functional EXCEPT that what would be the F1 through F12 keys at the top 
are actually permanent, molded, non-working, non-moveable replicas.  Can 
those fake F1 through F12 keys serve as the non-functional 
source-identifying trade dress aspect or is that precluded because they 
are a mere replica of functional items that look like, and are placed, 
where one would expect the functional items to be (and, hence, can't be 
source identifying)?

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