As requested by Brian, here are the main references I used for my Jacobite "Uniforms" or lack of them. I deliberately didn't use a standard tartan across units as it didn't exist at the time,
Osprey - Scottish Jacobite Army by Stuart Reid
Like Hungry Wolves by Stuart Reid
Wargames Illustrated articles in issues 296, 297 & 298
Practical Wargamer - articles in March-August 1994 (3 issues)
If I remember more I'll add it to this post.