Scholer-parts-needed

Hello, I have an Scholer that is missing some parts. I'm looking for the white buttons and the brown handstraps. I like to have one button incl the wood underneed it and one with or without the wood. Also I like to have the two straps. (not the straps on the picture, but the handstraps, picture is for type of strap) I consider to make them by myself, but original would be better;) Thanky you