If you're looking for military box pleats (which are, as far as I know, always pleated to the stripe), try these two:

http://whatpriceglory.com/scot.htm
http://kathyskilts.com/

If you're looking for knife pleats to the sett, that is the norm, and you can get it pretty much anywhere. Kathy does that very well, as do many people on this forum.

Any reputable kiltmaker should be able to get the wool for you.