What number did you try? I have never owned one of his cinches but was bored so looked them up, I know theres a few BB's that use them thou. Heres a email Len@thecorrector.net and a number it may be the one you already have tryed. 816 625 0333.
And also theres been a few threads on his products, I dont think hes very popular with some of the ladys on here I can bump them up for you if you want to see the old threads. And a few has recommended the Shoulder Relief cinch..
I had one for awhile when I was having major issues with my saddle rolling. Obviously it wasn't the best fitting saddle since it was rolling but the cinch helped in the meantime while I found a saddle that fit. I'm not sure if I had the wrong length (27 inch which may have been too short) however I got my horse massaged at a race and found sore spots on both sides where the buckles were. She had a thermal imaging camera that found hot spots there as well. Could have been nothing but something to think about.