I have been carrying around a Leatherman Core. 
I would prefer a leather sheath, perhaps one for a folder (4.5" long).  Where can I find a cost effective replacement?
  
Just a followup.  I decided to purchase the SMALL horizontal/vertical leather sheath from LL Bean.  It is, however, a bit more expensive than I planned.  I was just barely able to force the Leatherman Core into the sheath.  With time, the leather should stretch out properly.
Conway Yee