Super !
It's really good to see native trees that are rarely worked as bonsai and this one is really great : very natural-looking.
As for flowering, we all know that some species in their natural environment can take 10, or even 20 years to flower, so when potted, it is even more difficult.
But when it flowers, as one of my friends, Hans von Z., would say in the 70s, deraufkromiertenstahlsuperfuss !
I also have wild apple trees, and it's the same : almost 20 years later, when cultivated in a pot, no flowers yet. I suppose your Pyrus has more chance to flower since it was collected.
And the bark is superb, the bark of an old pear-tree.