Hi Amity,
I’m not getting any returns on my search queries on here. I posted several pictures last year of the entire filming area including the famous Hitchcock steps. I’m with you in that the steps were not replaced. These were a solid pour cement step with 1-2″ toppers. The area has been modified over the years, but trying to remove solid cement steps would be a structural nightmare. The handrails are indeed relatively newer, but the steps are the same.
The photos I did find of Kinderman in front of the steps are pretty clear and I compared them to the ones I have. There are vertical imperfections that still match from the original pour. Unless your friend has real proof, it’s doesn’t make sense.
Father Bowdern