used ideas from 2 different blowers, and then made the design from scratch. Might make further adjustments to it, but for now it is working great.
I'm not sure if it bumps up against the slim enclosure or not, but I know it can bring on the outside edges without binding or messing up.
These fit the default fans that came with the Rostock Max v3, and it is a pretty snug fit. I made one that is slightly taller (v3.5t) in case it is too tight for you. I printed in PTEG, so there is some flex in that material.
This works on the 713 effector plate, and can screw in for more stability.