Police Rank Diagram

Hello all..
i've been searching google for the past hour, trying to find a diagram of the Merseyside Police rankings. its come to no avail. I've come across this wikipedia page: http://en.wikipedia.org/wiki/Police_...l_Constabulary and it shows the diagrams of some of the forces' rankings, well it doesnt show one for Merseyside Police. I must include a diagram in my assignment or else I would not get full marks.

I would really appreciate it if anyone could help me find one

Arron x