I tried the woodlore trees sized one down, but they still don't work. With those, its the shape of the front section that doesn't fit well, as its much taller and doesn't go very far into the shoe. What trees are those? There aren't any identifying markings such that I might google them.
Made in the USA by Rochester Shoe Tree Co. (very well made I might add!):
They are called "Western" boot trees because you can use them in cowboy boots. Don't let that fool you...I use them in ALL of my boots, as was recommended to me by a high end shoe and bootmaker once and I've never gone back. Regular shoe trees just don't cut it for me in boots and chukkas due to the higher vamp. These trees have a higher vamp support and conform better to boots and chukkas. They raise up enough to actually help with creases and wrinkles, but aren't so wide as to stretch out the sides.