Not a dumpster find but, I was surfing the interweb and found someone's pictures of a restored Zieleman. I contacted the owner to compliment him on his bike and talk about Zieleman. He is from the Netherlands and found a Zieleman in my size which he said I could have as a gift (he was impressed by my 20 year search for one).
Marty Eison
Frisco, Texas