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What about that Tektro "power hanger" above?
Again, loads of people have taken the chatter out of their cantilevers with fork crown cable stops, but on your particular fork you're going to compromise the stiffness by spacing it forward to clear the rebate in the front of the crown. Since you aren't trying to clear huge tyres and mudguards, mini-V brakes will work and are the better option.
Yes, 926AL is the budget option, for people who can't afford Sora 😐The #tartmode Tektro option is TRP CX8. 4 which has the stiff C-channel arms like Shimano rather than the floppy angle iron of the 926AL.