https://wheelsmfg.com/derailleur-hangers.html
If they don't make it, it doesn't exist

Pretty sure they've always been frame specific.
Here in the rocky technical steeps of northern New Mexico, I average about 2/year.
Not broken, mind you, but bent.
So yes, there is one in both mine...

Once on the Burro climb, at the beginning of Whole Enchilada, I set the bike down and happened to hit a rock directly on the aluminum valve stem and broke it off.
I now carry an extra valve stem for...