http://www.grafs.com/index.php
I buy my goex 3F from above I just ordered 10 cans and split it with a Buddie
All orders on the Internet no matter how much you order are only $3.95 for shipping :I think no one beats them
but you will have to pay the hazmat which is $20.00
upgrade your vent liner and some black English flints from TOTW and you will be set
3F can also be used as a prime powder for the flint lock pan remember only 1/3 of powder in the pan and if you remember tap the charge away from the vent liner for faster ignition