That's not good is it. I found that when I phoned Yamaha uk for some information they didn't have the records. I also asked about a heritage department - they don't have one. The amount these companies make from people you would think they would take some interest. Without the likes of the people that created this website there would be almost no information at all.
Sometimes you have to dig deeper than the importers.
I wanted some original info for my AMG CLS55. Price lists plus options price list and brochure. So I asked MB HQ in Germany. They followed through to their archive people who sent photocopies of everything because they only had a master copy for their records. FOC! Brilliant.