Anyone use these "redesigned" coupler kits by Steer and Gear?

Years ago a guy designed a tempered steel wire retainer that snapped onto the OEM box coupling effortlessly. I dont know if he put a patent on it or how many he sold. It was sweet though. He and it disappeared form the market before I could buy one. At best I might find a old pic of it.
I saw a hose clamp used there once also. It was a steel crimp band with a ( shaped profile sort of like what is used on some cv boots. It also had to be placed during assembly. The ability to toss the steel wire retainer on without tools or labor is what made it so sweet.
I suppose that rubber cap works just as well as anything else.

In the dealers service department the trick was to do as little distorting to the original cap as possible when removing so it could be reused. Once in a while a customer might suggest the coupling hadn't been serviced because they didn't see a new cap installed.