How do I do it?
I cut my own solder paste stencils using a plotter cutter. As you can see it can cut QFN Pads perfectly. The stencils are cut from 0.125mm (5 mil) Mylar sheets.
If you're interested in getting one more custom stencils for yourself you can contact me at microInventions@gmail.com
I charge 0.1€ per cm² + postage and I ship to anywhere from Portugal.
Example: A 5*5cm design with a 1cm border around is 49cm² so the total is 4.9€ + postage depending on where you live.