The toolkit exists, but it’s only available to Z wave alliance members. That’s a minimum $400 a year membership plus $299 for the toolkit. Not something I think most people would find worth the cost just to map their own network.
2018 Update
The tool kit device is now available for individual sale And no longer requires an alliance membership. Lists at $249, but Occasionally goes on sale for anywhere from $149 to $189.
The following thread has more about what it is and what it does: