Alternatively, if you are looking for a more accurate layout - albeit in a fictional environment - you can download Monaco Historic from my workthread.
It's essentially the layout used up until 1967 but in the original GP4 environment, as if in 2001 we suddenly decided to do away with the Sainte Devote and Nouvelle Chicane kerbs and route the track through its old path, using the upper promenade instead of the Swimming Pool section too, just as they did in 1967. (Where the current pits are located.) These sections remained the same as they were back in the day, apart from the kerbs and the re-routing towards the end of the lap. (Well, they remained the same up until 2003, that's part of the reason why I modeled the track on 2001.)
My workthread - [www.grandprixgames.org]
Full of classic F1/non-F1 track layouts
My blog about F1 performance analysis - [thef1formbook.wordpress.com]