Honestly usually its just easier to make it reusable. The burlap works fine to break up the outline, just tear it up a little bit. You can get it from something like a potato sack. Use it around the front of the gun, and back to the trigger area. At that point your body is usually part of the silhouette. Go ahead and throw some nature into the burlap (it should thread right in).
If you make a ghillie, make your own, it'll match your environment better than any crap you can buy premade.
