I honestly don’t know how you could answer your question short of pulling motor vehicle registrations from all 50 states, and you’d have the complexity of the various names by which this particular model is identified (Cadet, Predom, Niewiadow…). Do you want to include the larger and even rarer Captain
model? How about those that are parked and out of circulation?
Only a small sample of owners are regular participants in forums like this. You could search member profiles, but not all members have a complete profile with the trailer listed, and again there’s the name difficulty.