I live in an older home in Hawaii that is single wall construction. The concrete foundation of the house extends into the bathroom by 4" wide and 7" high. Our 1952 toilet needs to be replaced and I can't find a toilet that will fit because the design of new toilet bowls extend too far to the rear and there is no clearance between the back of the toilet bowl and the foundation. We need a toilet with a clearance of 7 3/4" at the rear with a 12" rough-in. We spoke to a Toto technician and he jokingly said we probably could use a toilet with an 8" rough-in, which doesn't exist as far as we know. We are interested in Toto toilets but at this point, we will consider any toilet that will fit the space and has a good performance record. Our plumber has looked at our situation and agrees that we have a problem. Any recommendations or suggestions will be greatly appreciated.