I've been sitting on this pep file for probably about... 6 years now!? For the longest time I thought the file had been lost to a bad hard drive failure, but recently found it on a backup drive. So hey, get the file, let me know how you like it.
Download link - Rios Mask
That link will get you the .PDO file, a file opened by Pepakura Viewer. Feel free to modify the design, but please give me credit. Simply linking back to this site will suffice.
I would advise you to scale the mask up by 10-30%, depending on how large your head is. I think the mask looks great, but prints super small.