The short answer is yes, there are other rulers of exactly the same isosceles triangle shape. I think mine is Eleanor Burns. Takes a bit more struggle but the lines are also drawn on most rectangular ruler and technically we don't need the shape at all, but since I mostly quilt with scraps I can appreciate a nice acrylic shape to work with.
If, however, you are following directions that specifically use markings on the CG ruler than they might not work. But if you cut your strips to the correct height, make them all the same point/trimmed point/whatever, the shapes will work just fine.
I consider triangle rulers to be basic among my tool set. Just be aware that Hexes have 6 parts and so a 60 degree angle, and Octagons have 8 sides and so 45 degrees. The two are not the same but so easy to confuse when you grab them out of the drawer...
There may be other quilts that you will be happy to have them, I use them in V blocks like 54-40 or Fight
https://www.quiltingdaily.com/quilt/...r-fight-block/