NOTE:
There IS a difference between the Auld Bonnie Blue Bonnets and the modern Balmorals.
*they are related: the balmoral is a modern derivative of the blue bonnet.
HOWEVER, they are not the same and most reenactment groups would frown on one wearing a moden balmoral while representing a Jacobite-era Scot. (Actually, the same is true of the Kilt -vs. period belted plaids and "philabegs"- too.)

The Scot Tartan Museum one is pretty accurate (both cut-and-sewn and the knit one). Matt knows his stuff and makes sure that what they carry is of good quality and that the "historic" lines actually ARE historically accurate.