Like everything else I wouldn't be surprised if they have a dedicated website. I never looked into it, but there is a rather large following, especially for the 69-72 blazers.
Here's my 72 K-5 with the CST package, white and orange interior that some refer to as Houndstooth but it's not exactly the same as the first gen Camaro stuff. I installed a 6.0 LQ4 and a 4L60E using Advance Adapters for the transfer case stuff. It ran 14.30's and would embarrass a lot of cars that should be faster, like this 2010 SS Camaro for instance LOL
https://youtu.be/msgSc3S-yHA