Sorry about that, Beth...I have no idea how that link got in there!
There are also stools that allow you to bring your knees up higher, but they don't get you in as good a squatting position as the platforms.
Also, diarrhea can also aggravate hemorrhoids...has that been an issue lately? If so, make sure that you apply a good layer of oil so the acidity doesn't further inflame the tissue.