Nice website. Never used him.

My wife is sensitive to wool as well but wanted something tartan to wear when we visited Scotland last year. We ran into a vendor call St Croix Weavers who do a lot of tartan weaving of shawls, etc., in both wool and silk and I think other non-wool materials. It took a little effort to finally get the color scheme right as the tartan was a special non-standard one, but in the end we got what we wanted, for a good price. Sorry I don't have any further contact information but I am sure you could find them online if you did some searching as I have seen them advertised elsewhere, just cannot remember where.

Good Luck.