'rebuff to' is correct and usable in written English.
It is usually used in the context of rejecting or turning down an offer or suggestion. For example, "He gave me a rebuff to my invitation to dinner".
That would count as a staggering rebuff to Ed Miliband.
Ms Göring-Eckardt's selection was a rebuff to Claudia Roth, a flamboyant leftist.
The "secret" promise to Thasos was followed by a more open rebuff to Athens.
Burghley's rebuff to Spain was underlined by the Treaty of Blois with France in 1572.
A no vote would represent a blunt rebuff to Mr Morsi's and the Islamists' ambitions.
Failure to enact repeal would be a personal rebuff to troops now serving in two wars.
"This is a rebuff to all those who believed the reward was being revoked".
The rebuff to it is being hailed as a victory for the environmentalists.
Diehard opponents of the law will probably be energised by the court's rebuff to them.
And there was a further rebuff to the Clintons yesterday from a former friend.
According to historians, the men's fate was sealed by their rebuff to the king's sexual advances.
