RE: Pyrodex "P" 3FG
If you ever do order some, I too suggest you get FFFg. I use Goes also and don't have any problems with it. I heard that Swiss is a bit cleaner burning but I've never tried it.
Did you try doing a google search for black powder supplies in your area. It may be worth taking a trip. You never know what you will find in a black powder/ML shop.