The Player Mover FPS Input Controller retains the same name within SAM, however you will need to recreate the component using the new Deep Space Labs component creation path, the instructions for which can be found below. Once done, you can assign the new script to the Player Mover field on your new Active Grid.
--Special Note--
When you add this script, a Player Mover Character Motor is automatically added as well from the new namespace. You can copy over any settings from your old Character Motor to this new script.
You can add this component by selecting a game object and then selecting from the Top Menu Bar:
Component -> Deep Space Labs -> -> SAM -> Secondary Components -> Player Mover FPS Input Controller
or by selecting a game object and using the Add Component menu via its inspector:
Component -> Deep Space Labs -> -> SAM -> Secondary Components -> Player Mover FPS Input Controller