Other than Nondetection for scrying, aren't there a number of things from here and there that, instead of stopping scrying, either delay it, alert you to the presence of scrying, or give a specific false reading? How about to ward a room or an area?
What specifically works against mind *reading* rather than just mind *control*?
And what about low level wondrous items that help, rather than things that help via spells, which would presumably go on one time use scrolls until the character can make eternal wands?