I had a home-made Superbeetle Tow bar at one time that was great. Unlike the store-bought Super tow bars, this one didn't require bolting a bar or brackets to the car, and only took a minute to hook up. But, I loaned it out about 2 years ago and haven't seen it or the person that borrowed it since.
I have an idea that I'm pretty sure will work, but I haven't had a chance to have the part made. I am pretty sure I can have a piece made to clamp on a Super Beetles "deformation plate" that will alow you to use a standard beetle tow bar on a Super. The home-made bar I had clamped onto the deformation plate . . . I towed several different Supers many, many miles with mine and never had problem with it. I jack-knifed once while towing a Super with it (bad driving, nothing to do with the tow set-up) and after I got the bumper of my truck pulled out of the beetle's fender, I continued on my way . . . no damage to the bar or to the deformation plate . . . but it did do a number on the fender! :oops: