I am not sure what you mean?
I buy in bulk and sell by piece... Until we have a better system where purchasing data is separate from the inventory table and vendor unit of measurer is added to the system... I use a stock item in the system for the sell piece. When I place a PO the vendor understands that when I but 144 of an item, that I am buying 1 gross.
What I do: viewtopic.php?p=5930#p5930
But let me know, we could get a dev discussion started on this...