@cantsolvethecaptcha I like Fancy Steel but in your case I don't think their standard designs will work for your wife. The metal tubing that the shield mounts to is very solid and as such, it can't really be bent into shape.
I think the more traditional designs will work better for you (ie. MySteel etc), because the flat shield can be bent easily to accommodate your wife's pelvic structure. I think @Jen had to do this with hers to make it comfortable.
In any case, a custom belt with a fitting at the manufacturers is always the way to go. ;-)