http://www.amazon.com/Exomount-Universal-Car-Mount-Black/dp/B004Z8ZLOS/ref=sr_1_2?ie=UTF8&qid=1363786767&sr=8-2&keywords=exomount

I've been using this one for a few years now and I've never had any problems with it

Do you use a case with your S3? If not, there's a USB dock with power and audio floating around for another Samsung phone that just happens to be same the size as our S3.

If you're looking for something universal, I currently use this on my dash without any issues.

http://www.amazon.com/Exomount-Universal-Car-Mount-Black/dp/B004Z8ZLOS/ref=sr_1_5?ie=UTF8&qid=1363723022&sr=8-5&keywords=Exogear+Universal+Exomount+Suction+Car+Mount