QUOTE (Voran @ Aug 18 2013, 02:19 PM)

Well I believe that part of it (earlier narrative from KAM(?), not sure what edition) was that you don't just 'grow an arm' any more than you can just grow 'just a tbone steak', so you grow a full thing and harvest the pieces you want. Replacing 'just' a limb is kind of a hassle, hence the higher price, whereas in a sense it gets cheaper if you're using more of the vat job at once.
Which is a tad odd since we're now at a point where we *can* grow steak. Sorta. Kinda. You're better off not looking the information up online, but, it's a thing that's happening.
Growing a mouse with a human ear is much easier than growing an arm, of course, but yeah, odds are that "Grow a whole body, take what you need, recycle the rest" is the norm.