Bart,
You might try it yourself.
ALR Member Tim Albert's book is a great resource. "Recreating the 18th Century Hunting Pouch by T.C. Albert"
For photos of originals, Madison Grant's book, "The Kentucky Rifle Hunting Pouch" is quite good.
I had my Cub Scouts make hunting pouches as their summer project between Wolf and Bear years (about 9 years old) and they did ok.
Here's one my son made
Here's another scout with his
Here's my daughter with one she made with a little help
The medium is cheap and forgiving.
Try it!
Larry Luck