xliverpoollad

If all else fails you could try contacting the following...............
Merseyside Transport Trust which is the group restoring and preserving vehicles that operated for Liverpool Corporation/Merseyside PTE.  While route data isnt central to their aims members may be able to help.

Website is    www.mttrust.co.uk............they also have a Facebook presence.

Merseyside Tramway Preservation Society ..............no contact details given on their website but their  Archivist is Mr. David Taylor, 217 Heath Road South, Weston Village, Runcorn  WA74LY.

Hope this may be of help.