No AM tow bars that I know of, the AFV Club M88A1 kit comes witha couple. They are not that hard to scratch up though. Couple poles with end connectors and a pivot point in the middle with the towing loop on it. Good luck.
yeah i had no idea what it was, but the review on armorama helped out alot. watch out though if you want it functional, the couplers on the resin are kinda tricky, i snapped part of mine.