SelectScript.cs

using UnityEngine;
using UnityEditor;

public static class SelectScript
{
	[MenuItem("CONTEXT/Component/Select Script File")]
	static void SelectScriptFile(MenuCommand command)
	{
		Selection.activeObject = AssetDatabase.LoadAssetAtPath<MonoScript>(AssetDatabase.GUIDToAssetPath(AssetDatabase.FindAssets(MonoScript.FromMonoBehaviour(command.context as MonoBehaviour).name)[0]));
		//Does not handle non monobehaviour/monoscript components.
	}
}