Make if yourself, tastes excelllllent..not leathery like most crap...
I just cut flank steak into real thin strips, soak it in teriyaki/chillie/your fave flavor for 24 hours, then into the oven, hanging it over the rack so it dangles down, put the over on super-lower (about 150-180) and wedge the door open about 1/2" to stop it going tooo soft. 10-14 hours does it, depending on how thick the meat was/how much sauce it absorbed. YUMMMMMMMMMMMMMMMMMMM