Lost Angeles Rubber Works
http://www.larubberworks.com/stmph2.html goes directly to Yule and Solstice stamps
The Enchanted Gallery - Kimberly Crick - Heavy influence of Art Nouveau
Wild Frog Creations tarot, general Wicca, various others around the site main page under Mystic.
Annd this is where I almost gave up tonight. Search terms used were "Occult stamp", "Pagan stamp", and "Wicca stamp", each with Boolean removal (-christ -jesus) of unrelated results.
"Goddess stamp", on the other hand, got similar results to what I already have in my bookmarks. All of these are more general, except for the occasional Egyptian or Celtic knotwork.
Faerie Song Rubber Art Stamps
About Aftermidnight Art Rubber Stamps
MEER IMAGE the Art of Steven Vander Meer
ERA Graphics Rubber Stamps - Homepage