I think they are rebadged servo's from several manufacturers. I was looking threw some cheapy servos on Hobbyking and seen a few looked the same as others with matching specs. The only cheap servo I buy is Power HD. Ive owned a few and Im very happy with them. They sell them on Hobbyking, but I found this site! Far cheaper than anywhere else. I always bought the
HD1501MG
http://www.valuehobby.com/products.php?category_id=21