I'm not sure if this will be too helpful but Na Fir Dileas dress in early 18th Century Jacobite clothing. Check out the following pdfs for some pics:

http://nafirdileas.org/doclib/126281...Roy%202009.pdf
http://nafirdileas.org/doclib/126012...ews%202009.pdf
http://nafirdileas.org/doclib/126081...uir%202009.pdf
http://nafirdileas.org/doclib/125131...ng%2009web.pdf

You can also purchase some bits and pieces of historical Jacobite clothing including blue bonnets on http://nafirdileas.org/index.htm

Hope this helps!