I have sent some of the Tonga Branch and Shelf rock to J&J Marine in Red Deer. This is the same rock as what Eli was selling. It is air freighted in which makes it near the same cost as live rock. The Pukani is also available for order.
There tends to be 2 different styles of shelf rock. There is the flat thin(3/4") plates and then there is the type that is a small(10" to 20") table acro's with base.
The Walt Smith Reef Project Artisan made rock is an amazing product! Your tank doesn't start out with the bleached white dead rock look. It is environmentally safer and some of the proceeds go to help reef restoration in Fiji. Check out their FB site.
https://www.facebook.com/reefproject2.0/