The "traditional" slant brake was made obsolete in 1974.
You will never find a slant brake for a 24mm FSB.
If you want "traditional", you'll need to remove your FSB and replace it with one from an AKM, as well as thread your barrel 14x1LH for your slant brake (hate to tell you, but the 90° gas block isn't "traditional", either, so that means you'll end up replacing the whole barrel to obtain one that works reliably with the "traditional" 45° gas block).