Somehow when emptying our dyson, the piece on the bottom of the cyclone assembly came loose and disappeared. It wasn't noticed until after the trash had gone out. With no replacement to be had without buying the whole assembly, I took some measurements and eyeballed some of what it is supposed to look like from photos online. I'm not sure how exactly accurate it is, but it's doing the job.
If I was going to do it again, I might scale up the X & Y axes maybe 1%, as it was just a bit looser than I would prefer. It would probably best to print the first few layers and test fit, but it was a decent enough fit that I put it in and haven't touched it since. Performance does not seem any different than original. I believe this will fit a few other models as well.
Printed great in PLA with no supports on my CR6-SE, medium quality settings I believe, 0.4mm nozzle.
The author marked this model as their own original creation.