The wrench that came with my Red Label was just a flat piece of heavy sheet metal shaped kinda like a wingnut. Don't bother trying to get one.... a quarter from your pocket change works just as well.
If you want a decent wrench, get one of these:
http://www.midwayusa.com/product/517124/carlsons-t-handle-speed-wrench-choke-tube-wrench-12-gauge