I use these
http://www.activeankle.com/active-ankle-t2.html on both ankles anytime I step off the trails. Seen me right for the last 15 years or so (although they do need a bit of TLC and replacing occasionally). Amazon or ebay for cheaper (and UK) pricing. No leg shaving required!
I have actually been lent one of these by Martin which I am gonna take to Turkey with me for terrain walking, but long term I think I'll be needing to get some - thanks very much!
Aye Martin told me about them many years ago.
And this is what I wear. Much cheaper and fits into your shoes a lot better and no mechanical parts to go wrong.
https://www.amazon.co.uk/Kuangmi-Stabilizers-Auxil...
Thanks for the suggestion Jason will have a look at them