NEMA 17 Stepper Gaskets

Though this has been addressed before:
http://www.thingiverse.com/thing:1440
http://www.thingiverse.com/thing:4264
http://www.thingiverse.com/thing:4379

There wasn't a 2D representation that I could find easily for cutting on a laser cutter or paper cutter, so here it is!