Is there a single, comprehensive database of all tartans from all mills? It's not the Scottish Tartan Authority. I have been trying to find the Prince Charles Edward Stewart Modern tartan and no matter what spelling or syntax I use, it doesn't seem to be known to the STA.
I can find the tartan I am seeking on the Lochcarron site and on Scotweb, but naturally their databases will be limited to what they make/carry.

If I have to settle for the "largest" database, I will. I am simply curious to know if there is such a thing as a truly complete database.