501st member Sean Chun Tie has made this stencil and is happy to share , it has now been updated
https://drive.google.com/file/d/0Bx1wZrZy9OqSdFFOTXFqbm45elU/view?usp=sharing
This update will now give this better fit and look.
Print out then cut out the stencil
Then place onto the plastezote and cut out
Try on and adjust waist size by lengthing or shorting waist only where necessary , once happy place onto your foam and mark
Then go back to the stencil and cut out