FOR METICULOUS MEN, there are few accessories as coveted—and expensive—as shoes made from shell cordovan leather, a material prized for its durability, shine and resistance to creasing.

Lately, however, those looking to buy a pair have required not only deep pockets, but also an enormous amount of patience. Even if you are willing to part with $2,000 for a pair of navy oxfords by English shoemaker Edward Green, you will have to wait six months or longer to possess a pair.

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