We have an alpaca farm nearby. I often go there just to watch them run around. They also sell alpaca products there. I bought a pair of alpaca innersoles in hopes of relief. Well I slipped them in my sneakers and my feet were toasty all day.
I live in the states in New Jersey, but if you can find a source for them, get some. If not I can give you the name and number of the farm near me where you could order them. They are $10.00/pr. Hope this helps.