Originally Posted by
Vintage_Cyclist
This is going to sound Rube Goldberg-ish, but how about using a fork crown cable stop.
If you installed an upward rising strip of metal (2 holes) between the brakes and the fork crown, you could bolt the stop to it.
Cool. I didn't even know these existed until two days ago when I got this French bike, which has one. It looks like it came with the brakes: