You might try Sven in Sweden. He gives great service and he has a tremendous stock of Luxman manuals. He and his son both had something to do with them. I ordered a manual from him and received it in less than a week from when I sent the payment to him. His email address is:
sven@eiman.se
He takes payment in US dollars and is very knowledgeable. They also have some parts for Luxman equipment available as well. Very highly recommended.