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PublicDemand posted on r/forddiesels2w
Did this to mine 40k miles ago. The unison ring was seized and the actuator arm wore an oblong shaped hole into the ring. Used a wire wheel to clean up as much carbon/rust as possible, new unison ring with new vanes and a rebuild kit for the turbo. And a thin layer of anti seize to help. Still moves freely and plenty of boost. I used this cheap kit on Amazon https://www.amazon.com/dp/B07SFK338P Still available for only $99.99. I think I got a quality rebuild kit off of eBay, and be sure to replace drainpipe orings and high pressure feed line seals.