Don't say lack of a market is the reason why ready-to-wear suits never seem to come with more than a 9" drop. Maybe years ago that was true, but with weightlifting and niche websites, there's a reachable market. (Even if you discount that many of those men have little use for suits.) Don't cite tailoring, because the maximum recommended 2" adjustment to the drop-9 suit's waist won't work for someone with a 12" drop and other alterations probably will be needed within the 11" range. Yes, there are separates, but not from many brands and fit issues can come into play. Is it much harder to manufacture a suit with a drop larger than 9"?