If you re-invent them as guides instead of stops, you could glue / epoxy / JBWeld them on without worrying about the amount of force applied, esp. if you use good compressionless cable housing. I would still remove the paint in the contact areas.

Or perhaps a hybrid - if it's the force associated with the brake cables you're worried about, keep the ones associated with the shift cables as stops, but convert the brake cable ones to guides.