I could never find one for the former Hastings. that is the main reason it is a "former" of my stoves.
I always considered that a million dollar idea. A simple box insert into the existing bin. Unfortunately, I work with meat and not metal! While mine would smell really good, the puddle of grease would be a problem!
Depends on how badly you want one and how much you are willing to pay for it. If you take good measurements and draw up what you want, about any welding shop could fab one up for you. A body shop or yourself could paint it unless you find someone who powder coats. Unless you have a buddy with a welder that works for beer its going to be fairly expensive i think.