Esther, there's a product called Dr. Ho's Decompression Belt - it's been advertised for years on late night television infomercials. I never took it seriously, until I read your book and the positive things you have to say about certain external corsets. The corsets you mention favorably (on pp. 124-5) provide support and rigidity to the torso, without inhibiting pelvic anteversion. The Dr. Ho belt claims the added advantage of providing decompression to the spine by means of inflatability.
So the product appears to adhere to the principles in your book; however I would love to hear if you have anything specific to say about it, as I'm inherently suspect of any product advertised primarily (only?) on late-night TV commercials.