Can anyone tell me the Lucas P/N for the Stop Lamp Switch to my 1948 Rapide? My Frame Number is after that given for the cut-over from Miller to Lucas at # 2340. None of the Lucas books I have give a p/n before 1951-54, which is #31281A Type 54C and is not the same one for the 1955 models. Also, can anyone identify what is in place now on my RFM right leg in photo? I can't see any numbers, at least without removing it. It appears to be black Bakelite and has a U-shaped metal bracket attaching it to the RFM leg. I am assuming it is not original. Thank you.