>>198593
Look into making your own. Its very easy. You buy a cheap lean piece of beef like london broil, cut off any fat and cut it into thin strips. Then put it in a bowl with a marinade recipe. I typically do soy sauce or Worcestershire, honey, vinegar, liquid smoke. And put in the fridge overnight. Then put them on a cookie sheet with a grate and cook them at like the lowest temp your oven can do for several hours. Sometimes 10+ depending on what youre going for.
The more dry the better they keep, but the less, the juicier and chewier it is.