There is a “pick point” node in the Civil 3D Toolkit from @Paolo_Emilio_Serra1. I recommend grabbing the version which was released last week as it has a bug fix for this particular node. 
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There is a “pick point” node in the Civil 3D Toolkit from @Paolo_Emilio_Serra1. I recommend grabbing the version which was released last week as it has a bug fix for this particular node.