My family (Caig) is a sept of Clan Farquharson and we wished to have our own tartan a few years ago. We decided to modify the Farquharson tartan and have it woven. We had this done free of charge by Lochcarron Galashiels in the Scottish Borders. They have a computer system which does this remarkably quickly. The only cost would have been buying the tartan which they had woven for us, and that would be about £1,000.00 for 30 yards. We did not proceed !