It’s hardly a novelty now but I actually started working on a Topre to Cherry MX adapter back in 2014. The NovaTouch was not a thing yet and no 3D model for the slider/converter was available at the time.
It’s an incredibly simple model and I’m by no means a 3D expert, but anyway I hope you can make good use of it. Please note that everything is released under a Creative Common license, you are free to use and modify the models as long as you give credit and re-share under the same license.