Hi Mick, welcome to CA.
I think most of the available photos and film footage are in a book called Le Mans '55 by Christopher Hilton and an interesting documentary called The Deadliest Crash: The Le Mans 1955 Disaster.
I think you should find what you are looking for, but IIRC most of the photos/footage are looking up the straight from before the entrance to the pits looking towards Dunlop.
But IIRC there is a film of the Merc crashing into the crowd, very distressing, which shows the position of Macklin's car after the crash.
If you watch the documentary, towards the end, there is a very sad panoramic photo of the crowd in the impact area just before the crash and then the scene after.
IMHO Hawthorn caused the accident, contentious I know.