I found this Bluebird VIN lookup-Portal.
I don't have a BB so I couldn't test the site to see what results it brings forward but if someone here has a BB maybe you can plug in your info to see what information it returns.
From what I can see, you should be able to at least get wiring diagrams. Should be helpful to someone ???
(cut n paste from webpage)
Use Bus Lookup to find your unit.
Under the Unit Details tab you will find the Wiring Schematics button.
Click the Wiring Schematics button to get a list of all available schematics.
If you don’t know your body number, it is usually located inside the bus above the windshield on the Body Data Plate or you can use the VIN.