If you're looking for authenticity in your denim, you might want to check out the forthcoming Lee Originals Westerner range, which will be exclusively available at Oki-Ni from September.
First introduced in 1959 and produced into the 1960s, the Lee Westerners (sometimes called Lee Whites) were the first white dress-up jeans and jackets. The new versions are rare Japanese replicas, the trouser based on the classic 101z (now called the 100Z), accompanied by the 101J jacket and a Westerner shirt, all remade in 'Westweave Sateen'.
Each of the items will be available in black, khaki and tan (no white yet) for an as-yet undisclosed price. But if you're interested, you can pre-register an interest at Oki-Ni. It might be worth doing too if you want to guarantee an item. A close-up image is over the page.