You can actually find some amazing resources on Pinterest. Here is a board about 18th century Scottish dress and plaids and another on 1730-60 Scottish dress. Norah Waugh's Cut of Men's Clothing covers men's fashion throughout a few centuries in terms of patterns taken from originals. There is surprisingly little in terms of books out there on the topic of men's fashion during most of that time. Searching for any particular decade + the phrase men's fashion or fashion plates on Pinterest will bring up a fair number of boards. Or searching for Scottish portraiture from the time (if you find an artist who painted any Scots images, they may have done more and can be searched by name easily). Hugh Montgomerie is one of my favorite Scottish portraits.

I can't specifically give you fashion history, but it occurs to me that fashion from around the turn of the 19th century is still very popular among Jane Austen enthusiasts (source: my closet). So perhaps that may aide your search. One book that I know has pictures is this one: http://www.amazon.com/Fashion-Time-Austen-Shire-Library/dp/0747807671 It has more attention on men's fashion than many others I've seen. This book is being sold through the Jane Austen Centre, which has always seemed to be pretty invested in historical accuracy, but I'm not sure if it has pictures. http://www.janeaustengiftshop.co.uk/collections/books/products/jane-austen-fashion-penelope-byrd I hope that helps a little. I only wish I could help with kilts specifically.