help with a custom button up shirt

[Tobus]

Are you a member of your clan society? It might be worth checking with them to see if they have a source for clan-specific tartan material in light weight fabric. Many of the clan societies have done special projects in the past like this for flags, banners, apparel, etc. Even if they haven't, they might be able to ask the members to see if anyone has a source, or if there's interest in a special group buy.