You might want out check out Celtic Croft, here is a link to the flashes page and they do have your tartan available:

http://www.kilts-n-stuff.com/Highlan...e_flashes.html

Another thought if you don't have the time to wait for shipping is to see if there are any other tartan shops in your area, I'm lucky in that I have several tartan shops close by, not sure if that would be an option for you or not, but it might be an idea.

Good luck with it, and congratulations on your upcoming wedding.