There is the GD Sidekick group, http://www.grimdawn.com/forums/group.php?groupid=2, that has a save file download of items. I don’t recall if it has every item, but it should be close. Read the posts in the group for more info.
I tried using GD stash but there is no documentation anywhere on how to use the damn thing and it never works no matter what I do with it. i also heard that it made some people unable to even open the game. is this still the best one out there?