This is an old recipe handed down based on Betty Crocker's boxed Noodles Romanoff. It has since been modified to get the sauce to taste as close to the original BC as possible - and after trying many other Romanoff recipes, I have found this one to be genuinely as close as you can get.
The hardest part will be finding the Kraft Macaroni & Cheese (Cheese Topping). It is a 3 oz. blue can found near the canned parmesan cheese. I'm able to find it at my local Super WalMart, but if not available for you, just substitute with the cheese powder package found in boxed Kraft Mac & Cheese.