As I recall, the vast majority of our Seaforth kilts were acquired from Scotland. I examined those that I collected for the Seaforth Museum - including one from the vet who wore it in WWI (he explained that some of the holes in it were bullet holes, and some were moth holes - he could not tell me which were which though).
Rob MacDonald who had served in the regiment with me as a fellow subaltern in the 1970s today makes kilts to order in the Vancouver area.
Remember too that the officers' kilts are a finer weave and a wee bit softer on tender parts of the anatomy.
I still have my father's officer's Essex Scottish kilt (MacGregor tartan) that he acquired in the UK in 1943.
Left to right: Lieut. A. H Stevens, Governor General of Canada the Earl of Athlone, unknown man. Hamilton, Ont. 1944. Dad is wearing a 21 Army Group patch under his Essex Scottish shoulder title. The kilt it the Macgregor tartan. I have the battledress blouse, kilt and sporran that appear in this photo. Dad had cut off the 21 Army Group patches, and I have replaced these two with other originals that I was able to obtain.