I LOVE this pear! The Maverick, I think, is the imperfect-looking comice pear that Harry and Davids sells. Their "perfect-looking" comice that they put in gift boxes are labeled as Royal Riviera.
I grow it, and also a couple of similar ones (Dana's Hovey, and I forget what the other one is without going out to look at the label...).
My trees are too small yet to harvest scions from, but One Green World in Portland Oregon sells the trees.
Carolyn