Hello.
Something that I have been doing for myself is building an index of the contents of the BRB diagram books on the Barrowmore Model Railway Group website.
My main interest is wagons, so that is where I have started. So far I have indexed books 300 (part 1), 320 (parts 1-3) and PO Stock (parts 1-3).
This was done with the thought of kit building, kit bashing or scratch building stock from common components e.g. if I have a particular underframe available then what can I put on to