Yeah the tools are a bit expensive for what they are but they work nice. If I had a 3d printer I would have just made my own for sure.
If you shop around you can find the clay for pretty cheap. I bought that lb of clay I linked. I've done around a dozen sets of tires with it ranging from 1/10 scale buggy all the way up to the Fireteam tires and I've hardly put a dent in it.
Your local hobby store should have the Traxxas turnbuckles and Amazon should as well. Traxxas 3643 is the part number that you want you need 3 pairs. I would also suggest a 5mm turnbuckle wrench.
I'm confused about that. The steering links are not the same length as the camber links on my v3 big rock. I can take a pic when I'm done out here in the shop.