Trading Post Originals are made by Central Shoes in Tokyo. The lasts were developed jointly by Trading Post and Central, and apparently they are inspired/modelled after English bespoke samples to look and fit as authentic as possible. The leathers are sourced from Italy.
Central Shoes makes Goodyear welted shoes in various price points (to their clients' needs), and I've only heard good words about them. Central also makes for Corno Blu, Sanyo Yamacho, and they also have their own collection (with their namesake) sold at the World Footwear Gallery. They are all a bit more expensive (vs TP Originals).
Thanks, nutcracker. I now recall the sales lady also saying that their leather is sourced from Italy (but the shoes are made in Japan). She actually said that the craftsmanship involved in making their shoes are much better than most shoes in the same price point (US$400~). According to her, they are also fully recraftable (for about $130).
I'm going back to the store this weekend and would most likely get a pair. Hopefully their lasts fit me well.