I seem to remember a realtor who kept plans for lots of houses and models. Don't remember her name, offhand, but I'll bet there are a few obsessive/compulsive realtors who collect these things as houses come out, so that they are equipped with the floor plans when they sell the houses years down the road. Maybe start calling the local realtors? Who knows, I might even have one in my piles, somewhere, because we offered on a Treehouse once (just off Gosling in that Hidden Lakes area, on Misty Morning). If I find it one of these days, (I'm in a major declutter mode this year), I'd be happy to send you a copy, but I'd try realtors first.