I found a Blue Willow Umbrella Stand on eBay.
It cost more than I wanted it to, but….
So, they do exist.
Since I posted this, Blue Willow umbrella stands have shown up a few more times.
They are always bid up to more than I am interested in paying.
I was given this umbrella stand. It is a terracotta type material, like majolica. The glaze is white with hand-painted lemons and a blue border. It has always gone very well with my cobalt blue, white and yellow.