Unfortunately, more times than not, I am forced to scale the converted to CAD file using a hospital door and guessing the width of the door, by standard door widths for a certain type of door. I usually get it 'close' for our needs, such as figuring how much Network wire we need down hallways.
Sounds like a job I did that had at least 20 buildings in every state.
Sounds like they need the location of equipment and distance between and general idea of conditions(will route to run wire require a lift, is drop ceiling, open warehouse, etc...)and is much cheaper to over estimate 20' to 30' of being off then to pay all the resources required to get a accurate set.