Try joining the Vintage Piper club:
http://www.vintagepiper.com/
Let them know what you're looking for and they will help.
There are loads of Super Cubs out there and if you're serious you will find what you want in 3-6 months, max.
Beware of buying European. I explored it, but there are all kinds of pitfalls. I'm not saying don't do it, just be very careful.
QDM