Though this has been addressed before:
There wasn't a 2D representation that I could find easily for cutting on a laser cutter or paper cutter, so here it is!
I had trouble cutting cork sheet on my laser cutter but 2mm EVA foam (craft foam) worked great! Here's my settings I cut it on my 35W mini-18:
Freq: 500 Hz
Tip: You can install the Z axis gasket without removing the pulley by cutting a slit in the gasket.
Though I used a laser cutter you can just as easily just print this design out and cut them with scissors or an hobby knife, or you could order some from me </shameless self promotion>: