that would be a very good idea but I hate to burst your bubble here where would it get the replacement for the corrupt file? shure it could search for another file with the same name but that file has different codes, and both would not match. that's why there are files with the same file name that are shown seperate in your search field. they put the files completly iddentical together so this prevents corruption, and bad information.
I think that if you could still download the file you'd need a healthy source. though maybe for some files it might be possible if the corrupt is iddentical to the one you'd take a part of the only difference between the both is the corrupt area