You will find far fewer challenges in repairing items rather than replacing. If you replace you will have to get the changes 'engineered' to get through LAA engineering.
If you repair then that process is much simpler. I had a 601 with the azusa cable brakes - they were ok. much better than those on an Auster (although that is not saying much). With a Turbulent's lack of mass really effective brakes are more likely to put it on its nose.
I seem to recall reading years ago, that there is a limited movement in the undercarriage and this was being blames for spar damage on I think Turbulents. Certainly I have seen similar distortion on at least one microlight and they have significantly stronger undercarriages than these older very light aircraft courtesy of Section S.
The most straight forward option is to simply replace the axles and repair the brakes anything more has the potential of opening out into a project and significant downtime.