highest possible pitch

[Julian Peterson]

Howdy.  Sorry if this has been addressed before, but I couldn't find a simple 
solution on the archives (although perhaps I'm not searching for the correct 
terms).

I would like to notate an arbitrarily high pitch using an upward arrow as a 
notehead, but note-head-style.ly does not contain such a symbol.  Setting the 
notehead to "do" gives me a somewhat useful symbol, but I would prefer 
arrowheads.close.11 from the feta font for the notehead.  Is there a simple 
method for using any arbitrary symbol as a notehead?

Thanks for your help,
Julian Peterson