Question about package moveit_simple_grasps for baxter

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Hi, I met problems in using moveit_simple_grasps for baxter.

When roslaunching the grasp_test.launch, I met error: "Joint 'right_gripper_l_finger_joint' not found in model 'baxter'. So I guess I need to use my own end-effector file? All baxter config files are in baxter_moveit_config package, but I could not find the yaml like the default "baxter_grasp_data.yaml" in baxter_moveit_config package? Could you give me some hints about where can I find a similar file (like "baxter_grasp_data.yaml") or how to generate it without affecting original baxter config system?

Thanks very much!