Hey Snowy mine are approaching the end of their life and they have done more miles than most. I have just bought Lochie (Eldest son) a pair of Matrix braces from Stephen Gall for around $600. He spend the time measuring and adjusting them to get the perfect (like but not custom) fit. I am getting a pair of him as well soon.

I could organise another deal with Gally and maybe even a central meet and fit day, who knows if there is enough interest. I can definitely put you onto him either way.
I looked at other braces before speaking with Gally (He does most the RideADV rides) I looked at single side and all sorts because I have rooted knees and this is really important to me. I like the Asterisk braces as these are my second set but the after sales support from Gally in the Gold Coast instead of a company on the other side of the planet makes more sense. As for the movement in the joints you described that is normal and I am sure when strapped in place will be fine. Gally used to sell Asterisk and knows the product and said they are a good thing.
TB