These mirrors are usually expensive here in Japan as well, but may be easier to get than in Portugal. I've seen them on Yahoo Japan for 20000 Yen and the full stainless shiny ones go for 25000 Yen. I might be able to help, except I won't be able to do anything until after New Years as I'm leaving for a couple weeks out of country and then when I get back Matsuoka will be closed for the holidays.