hoopoe:
I always had to have coats tailored in, with the shoulder /bust arm length dilemma.
Getting the shoulder / arm right meant a sack below. A quick visit to the cleaners tailor made that adjustment.
I wish more breeches makers offered what in the jeans world is called W size. Womans (W) sizing is just a little more generous in the hips and thighs without being stupid in the waist… Nearest I found were Royal Highness and Shaply her breeches via VTO
As a dressage rider I always appreciated breeches that had pleating in front, was always just the extra bit of room needed.
Orangutan arms, that knows no size. Eddie Bauer is one of the few clothing makers who consistently offer Long sizing, though I have quibbles with their cuts fit and styling as well. No older woman with active outdoor lifestyle wants to be showing her décolletage all the time
I wonder how the OP turned out with her research project.
Check out the Curvy Mare collection by Buckwild. It’s the only one I’ve found that’s actually shaped for plus size people, and not just bigger everywhere.