Zuzu ...
The reason 'Shadow Dancer' was unavailable for many years is that Ralph sold the patent rights to SD to Weeks Roses. It was such a good rose, he wanted wider distribution than it would get if it were sold just by his nursery.
Large distributors, like Weeks, were always looking for the next new rose and Weeks stopped distributing SD after a few years.
When the patent ran out, Berling and other nurseries were able to sell the rose.
btw ... porkpal, Berling has a lot of the ogrs you love in her inventory. You might want to check them out.
Smiles,
Lyn