Information Required on a Kato 880 SE.

Hi Guy's, Can anyone tell where I can obtain any information or a workshop manual on a Kato 880 SE excavator? I have contacted Kato works in Japan, they referred me to the dealers in Australia and they respond with that's an old machine and have no real information or schematics on file. To me this seems crazy and would not be the case if it was an old Cat. So I'm here hoping someone maybe able to point me in the right direction. Thanks for reading and have a great day. Trev