I had a similar problem looking for red hose but finally found them in claret at http://www.highlandclans.co.uk/Kilt_...FTlNQgodESiW1Q

Unfortunately they don't offer brown but they had an interesting comment to make about cream hose:

"Why should anyone want cream hose? This is a very modern practice, created by some hire shops, which has no historic basis at all! "

Interesting comment I thought.