Reading over the comments, Steeve, it sounds like you're on your way there. I understand what you're saying on the flashes, they're stiff, so the garter ties would probably do the trick.

Also reading, I think it is the use of any tartan tie, matching or not, that is being considered offencive. The use of tartan flashes is not so welcome, as well. I like to go to the second hand or Good Will store and feel through all the ties for the ones that are not silk or silk like. The wool ties work out real well for me; just a thought.

Good luck.