The single most difficult part of rebuilding a Pee Wee bike is the iconic tiger siren. These sirens were made several decades ago in Italy and then modified slightly for the movie. They are all but impossible to get your hands on. Would anyone be interested in modeling this for me? Myself and many others out there trying to build this bike would be eternally grateful. http://i.imgur.com/YrTQS.jpg
I don't know if this is helpful or if you've already exhausted this resource, a guy on Youtube posted this: