Sounds like what you need is a pair of our "fully fashioned" Lewis kilt hose. These are made just the same as our standard Lewis hose, but made to fit an extra large calf. But the foot of the hose is still made according to shoe size, so you should be able to get the fit you want.

They are listed at the bottom of this page:
http://giftshop.scottishtartans.org/hose_lewis.htm

It says this is a special order item, which is generally true, but I do have a small stock of the fully fashioned hose on hand at the moment. If you are interested you can call or email the museum and let me know your shoe size. I can tell you what colors we have on hand in that size.