Hello all, just to make this post complete, I did buy and mount the CGW dot sight mount. It is listed as for the 75b series, but it fits the Kadet cut and upper slide just fine. I was told by a CGW employee that it would fit, but I needed to see it myself before I would post this.
I can now tell you with certainty, it is NOT made by Springer Precision.
I did not yet mount a site, but I do have the base on the upper slide. It does fit well, and it really "hugs" the top of the upper slide, as to keep the sight as low as possible. The drawback, is that you must remove the rear sight, and unfortunately the factory Kadet sight is peened in place. So after removal, if you wish to re-install, you will either have to peen that area again, or do what I did, which was to drill and tap for a small set screw thru the sight. This mount will fit a Burris Fast Fire, a Vortex Viper or Venon, a Docter, and probably others too. There is even a Chinese Docter knock off available for 40 dollars?