How about the correct, brand new gas caps for
your 67 thru 80 Husqvarna! or Maico!
You can add a vent tube in the center and be correct for 81-82 Husqvarna.
You can powdercoat it black and be correct for 83 (some 84).
If you selling a used bike, why not make it look attractive to a potential buyer by fitting it with a new shiney cap.
1 cap - $40packaging/shipping - $10 for 1-4 caps
2 caps - $75
3 caps - $100
4 caps - $120