They only cost a couple of bucks in most cooking gadget stores. I know you can get them at bed bath & beyond. I use it for lots of things. Here are a couple fo photos of the end saran wrap twist & squeeze to make that part clearer (I was just finishing a couple of pizza fatties so I took some extra photos)
wrapped before twisting after putting on the bacon wrap
see what the end looks like - loose and not tight
grap the ends of the saran wrap and roll it in the air a bunch of times (like a sausage) till it tightens up and compresses the whole fatty an inch or so in length - see what the end looks like now?
I'll put this back in the fridge for a couple of hours to set, then onto the smoker.