One company I can personally recommend, but with caveats, is Mayfaire Moon. Their work is fantastic, and they prefer to measure you in person to make sure they get your dimensions -perfect.
THAT said, they are expensive! A few to several hundred dollars. Top notch materials and craftsmanship, but you pay for what you get!
Also, they are very slow to deliver. They've a large backlog of orders at all times, and work slowly through them. Expect three to seven months time between measurement and delivery.
They will take payment plans, though! Which is ideal for people on a budget. Given at least a four month schedule, you could set aside 100$ a month for a simpler corset and be set.
Not ideal for most people, but if you want something that stands apart, they are well-loved-by people who can afford it!
KaT Adams
"His name meant 'Glad Voice,' and once again had meaning."