Hi Craig, With my question I am trying to find out the correct type of John Bull footrest rubber for the first few Series B Rapide which apparently were fitted with these prior to the typical HRD/Vincent ones being produced. Were they John Bull number 5, number 1 or some other variant? An early works post war photo that you've posted on thevincent.com demonstrates such a machine.
Unfortunately I don't own or have any information relating to the Series A bikes so cannot answer your question asking where they are found.
From my understanding, the early series B bikes did not have a kick start rubber. If anyone could also advise us on the appropriate gear lever rubber it would be much appreciated. Thanks David