Here's some sites that I found:
http://www.hobomama.com/2012/03/how-...y-carrier.html
https://www.youtube.com/watch?v=6_NRExB4vgk
https://www.cuteness.com/article/mak...carrier-purses
http://www.ehow.com/how_7769575_make...small-dog.html
https://www.reference.com/pets-anima...f15852c795c2f2
http://www.baxterboo.com/l.cfm/dog-carriers_dog-slings
Some of these show visual instructions, some don't. The last one is just a picture of some store bought slings that might give you ideas as to how to make your own. I could not find much on the web but maybe this will give you some ideas as to how & where to begin with yours.
I love little pugs (never owned one but love them). They are so cute.