Before a custom, post a request for some on the "wanted" section of the forum. When I got my half of A Hay's X Marks material, a few (2 kiltmakers, of I correctly recall) said they has some left over.

That said, there are QUITE a few who joined after me, and I just missed the last fabric run. There may be interest in the near future though, as some "newbies" may want a kilt in that nice tartan.