I don’t know where Nico’s strap from, thinking how he is probably an original from the era? I saw some tropical straps in Atelier Romane, however I never bought anything from them so can not vouch for the quality etc.
This watch is another placative example why vintage always beats modern. This attractive patina can't be replicated or remade. It just has to "happen" by itself as time goes by, like grape juice becoming a fine wine after many years.