Ron,
I was just looking to buy a new push mower, and in the research I did, I found that Toro/Lawn Boy and Husquvarna are the only 2 big names that not MTD. Toro and Lawn Boy are the same company, and Husquvarna is a different company. Most of the rest are indeed made by MTD, including almost all of the "House Brands"... out there.
Ironically, in the end I actually bought a new Cub Cadet push mower, and really like it. It is mainly a "trim" mower as the big IH Cubs do most of the work. I actually found the one I bought, searching for one like Robbie posted. I will say, the push mower is fairly well built, it is heavy, and the steel the deck is stamped from is thicker than the other MTD mowers.
The big boys are behaving though, they have not been picking on their new little brother while they are sitting in the garage.......
I wonder if any of the sponsors have parts for the old IH Push Mowers.........