Here I work on a 2009 Marzocchi Corsa. It was one made by SR Suntour that had the crimped shut gas pressurized damper. Over time the damper would ingest the lower leg oil and your available travel would decrease until the fork was completely hydrolocked.
Here’s the thing, you can get fork bushings relatively cheaply but the tools cost an insane amount of money. Here’s a cheaper but highly functional alternative to what’s currently out there.