The Cape Breton Provincial tartan is available in 10 oz merino wool from Fraser and Kirkbright out of Canada, from Lochcarron in 11 oz standard wool tartan, or custom made in whatever desired weight from several custom mills. Neither the 10 or 11 oz are likely to be great for kiltmaking, but would probably be fine for skirts. If you come across a heavier weight tartan kilt in CBP tartan, or want one it would probably be a custom weave.