My girlfriend makes leather stuff. She runs her own business on the side. She has made 2 holsters, a sling, and a chest rig for me.
http://www.facebook.com/#!/pages/Tin...78694752173455
When she makes holsters for pistols, she plastic wraps the actual gun, and molds the leather around it. (Instead of making a gun replica from wood.)
her designs are much simpler than this guy's. She doesn't have to stitch as much. Here is her way of making a glock holster.
http://www.airsoftcanada.com/showthread.php?t=120076