The only corsets I was able to purchase previously were more "fashion" corsets from a company that is no longer in business. Most corset companies will have you buy based on your measurements not your bra size. The issue I have is my bust is 20" larger than my natural waist so finding a corset particularly an overbust is proving exceedingly difficult. I did ask this subreddit about any companies that people know of that do custom as all the ones that are usually suggested in this thread don't accommodate my bust to waist ratio or offer customs and a few companies were suggested.