Not really, as Head enchants we're BOA, not BOP, so you could grind the faction on your main, to have all factions exalted, then buy it with him and post it to your alts.....which begs the question of why anyone would feel a need to grind rep with more than one character, if you do it, it's your choice...
---------- Post added 2012-05-31 at 02:46 AM ----------
from what i've read, shoulder enchants are no longer a faction reward, they are now done by scribes; these could be given to scribes or enchanters too, but blizz seem to think it just complicates matters