One needs to be careful with the Sanders range as there are two types of what looks like the same boot. One model has a far thicker sole than the other & is a waxy-type leather which will take polish but not a shine.
Although I'm not in the Donkey Wallopers a friend of mine that is pointed me in the direction of Shipton and Heneage. Excellent quality but maybe a little more pricey than some of the other suggestions. Link below: