Textures

I've been using a lot of textures lately in my icons, been a bit obsessed with it in fact. Thing is as much as I like the dozen or so I have, I am eager to find more. BUT I don't want textures that are only 100x100 becasue I like to double or triple layer textures in different positions. Can anyone help me out with links where I can find large textures?

Thanks in advance!