Back issues of Leyland Journal and Torque are still available from Leyland Society. People put a lot of effort into research and publications so there is an unstated expectation that you join and play a part,. As they say nowt for nowt, the more so as you are a commercial operation.
Image from web of model, chassis No and order number location, and they are often as feint as this. Sometimes they are on the near side rather than in the centre.