More help finding lossless downloads please

I posted a few months back looking for losslesss downloads available from "The National" and was given the Juno site which is a fantastic resource, many thanks!

Now I am searching again...this time for Iron & Wine, Bon Iver and Calexico. I did a few searches and cannot find any flac/wav files available for purchase. Anyone have a direction you could send me to find lossless albums from any of these artists? High resolution would be amazing but I think thats a reach...