Heinz still does, though it is not called "One Carb" anymore. There are also plenty of ketchup out there that use no added sugar. However it can be a 'spensive way to make a large quantity of sloppy joes...

I generally buy an organic no sugar, no artificial sweetener ketchup that is not that out there in terms of price, but I don't use that for sloppy joes. I do use the Heinz and a wee bit of sweetener.