I wanted to do this a few years ago, so I asked about it here. No one reported that they had done it or heard of anyone doing it successfully. Several people said it doesn't fit. I'm not sure of specific reasons that were given but they were convincing at the time.
I think you are out of luck, but I hope you are pig-headed enough to go ahead and buy a CZ Kadet conversion and a NZ85 and prove it. And I hope you will come back and report the result, especially if it is success, because I'd like to know, too, but I can't afford to be as pig-headed as I'd like to be.