Good morning to you. I made inquiry for you at our local re-hab Hobart mixer shop here in Las Vegas, NV. I am sorry I have to be the bearer of bad news. The 20 qt. bowl costs $340 New. The reason you do not have a dough hook is a dough hook doesn't come with this model. Only a paddle & a Whisk. This model was designed for pastry baking.
Good luck to you & enjoy the rest of the day.