That last one with the flat top is NOT a T97... its certainly a variant but I'm going to go out on a limb and say the way it functions is too far from how a T97 functions for it to be a convert. Could be a next generation though.
Still, I don't see why people have such a problem with installing an FTU on the T97. The fact you need to cut a piece off is inconsequential when you figure the benefits the FTU adds. Once you install it, you'll never want to take it off anyway. But, to each his own I guess. Id rather buy from a canadian company... even if the parts are going on a chinese rifle.