There is a high probability that unless (or even if) you go through someone high up in the NBTHK, the long process and the final answer will still be no. (An ordinary non/specialized Japanese person would not make much leeway in there.)
Dealers tend to keep old paperwork with a blade, just on the off-chance, i.e. better for some customers than no papers. Resubmitting is generally too much trouble for them, especially if there is any possibility it might fail.