Serovtronix's solution for low voltage drive is the LVD. For details see this link: http://www.servotronix.com/lvd.html
As for motors, Servotronix Motion Systems in Israel is the exclusive distributor of Kollmorgen and Portescap. Kollmorgen's PMDC series is suitable for low voltage applications. Portescap offers miniature motors solutions that are especially designed for low voltage requirements.