I bought my first Utilikilt in January, two more a month latter, and am looking at getting a traditional in the Washington State tartan for more formal occasions.

I would like to get something along the lines of a medieval peasant shirt (example) or a viking style shirt (example) to go with my Utilikilts. I've been wearing T-shirts, which is ok but not really my style; I wear button down causuals when I'm in pants, but those don't look right with a kilt.

I have been able to find suppliers of cheap theater-quality stuff, and tailors who can make what I want if I have lots of money and can wait until September. I'm hoping someone might have leads on where to find decent shirts that won't cost a mint and which I can get before the end of summer. Any help would be much appreciated.