This might not be much help as I am here and you are there,
Amazon is fine, just go in, set up your account and buy the world.
Suet is a hard fat that occurs around animal organs, I can remember that when you bought kidneys they had a thick layer of suet around them. If you can find an old fashioned butcher he just might be able to help you.
Try a pet shop, suet is a main ingredeant for many bird feeders and lots of people over here like to make their own combinations.
Somewhere out there somewhere is a WW1 British information film about making suet from potato peelings, but I cannot find it, but then I'm not trying very hard.
Gosh how I remember my mothers clouty dumplings with figs in.