My Sentiments Exactly 
Offers a wide selection in a variety of styles and themes.
http://www.sentiments.com/My Stamps by Cathy Daulman
Creative rubber stamps and exclusive products for rubber stampers, calligraphers, mail artists and paper artists.
http://mystamps.bizland.com/
Magnolia Station
Folk art stamps, stationery, and hang tags.
http://magnoliastation.tripod.com/stamp3.html
The Merry Stamper
Specializes in images of angels, and hearts and bears. Offers grab bags, sayings, projects, acrylic mounting system, and links.
http://www.merrystamper.com/
My Heart Stamps for You
Rubber stamps, radiant pearls, acrylic mounting system, and accessories.
http://www.myheartstamps4u.com/
Meer Image
Offers handcrafted fine art rubber stamps designed and made by Steven Vander Meer in Arcata, California USA. Available in mounted and unmounted.
http://www.meerimage.com/
Mohr Stamps
Includes world themes specializing in Persian images. Also cushion backing and tags.
http://www.mohrstamps.com/
