I don't know if the re-building of concaves has ever been economically viable - & before I get a blast of abuse from others, I'll just clarrify that. When a concave is worn, they are usually not straight as well. They can also be twisted, the wires are worn out & the holes the wires run in are worn as well. From experience, I feel, by the time you spend all the money to repair it , you may as well buy new ones. You really are only putting a bandage on a gaping wound. It's up to you but I've wasted money on repairing concaves before. By the way. I don't work for any manufactures or dealers. I've just had 25 years experience in fixing combines, owning & operating them. Another thing that you might like to think about. Why would concaves need blanking or filler plates in them if they designed properly in the first place?