Stone hat

ok, stupid question, but i want to know what shops sell fedora hats. im in the UK and ive checked asda, but i dont know anywhere that will sell them. and im not looking for online stores. any ideas?
check out at amazon there are really good deals going
^^

I have a new straw hat that I like, but it is way too lightly colored. What is an easy and cheap way to darken it like many straw hats you see?
shoe dye polish