I needed a warm toilet seat for my spouse so I purchased: http://a.co/2QtcUgW

But when I received it 2 days later, I realized that I also needed the top mount adapter kit from Brondell: http://www.brondell.com/lumawarm-top-mount-mounting-hardware/

Not wanting to pay $4 for the kit and another $8.95 in shipping only to wait what I imagine would have been at least a week, I created my own version in OpenSCAD. It is parametric in case you need to tweak the values for your setup but it should work fine as-is for the Brondell LumaWarm, Breeza, and Breeza Warm models. It is sized for an M6 flat head machine screw because that is what my toilet came with (I just purchased longer versions... 60mm) but, again, the size is parametric.

The bidet in the photos is this one: http://a.co/3l6IF1W