Seasaidh,

As others have mentioned here, there are a number of potential resources for tartan material that you should check out. However, I have spotted a couple of auctions (actually 'Buy-It-Nows') for wool tartan cloth from good mills, on eBay. Better yet, they are Fraser tartans and each is about enough for a 4 or 5 yard kilt.

http://www.ebay.com/itm/200776613270...84.m1423.l2649

http://www.ebay.com/itm/400303929639...84.m1423.l2649

I especially like the Fraser Hunting Ancient and it's from Lochcarron.

Nile (A fellow Fraser)