Did anyone ever get a vision of Vitthal in Shirdi because of Sai Baba?

Yes, Chapter 4 recounts multiple instances where devotees had visions of Lord Vitthal through Sai Baba's grace. When Baba asked Das Ganu to organize a Name-week (Saptah), he promised that Vitthal would appear if the devotee was full of faith, and indeed, Das Ganu received a vision of Vitthal at the end of the week. In a separate incident, Kakasaheb Dixit had a vision of Vitthal during his morning meditation. When he later went for Baba's darshan, Baba confirmed the experience by asking, "Vitthal Patil had come, right?" and advised him to hold onto the vision. The experience was further validated when a picture seller arrived with an image of Vitthal that was an exact match to the one from Dixit's meditation.