classic motorcycle forum

I have a 1932 Raleigh 3 wheel Light Delivery Van with the Sturmey Archer 600 cc side valve engine.  I am looking for an ignition system for the engine.  There is a coil, and I think the ignition points are supposed to run off the back of the generator (which I don't have either).  I understand that these engines were fitted to various period motorcycles. Does anyone have a source of parts or a drawing of what it is supposed to look like?