https://www.rockymountainatvmc.com/parts/ktm-phds-progressive-handlebar-damping-system-p
I was also using the CSP clamps (because I bent the stock ones trying to get over a log.).
https://www.splatshop.co.uk/csp-triple-clamps-kit-sherco-scorpa-tech-forks.html
https://www.splatshop.co.uk/csp-upper-triple-clamps-kit-sherco-scorpa-tech-forks.html