TRX 300 FW Steering Shaft Bushing Replacement?

Was riding our 300 FW and suddenly the steering shaft got really loose. Discovered the bushing near the top inside the clamp is missing. I ordered a replacement bushing and wondering how to replace?
I’m hoping I don’t have to tear down the whole front end. Would be nice if the bushing had an opening to allow sliding it around the shaft. Does it? Any help appreciated!

TIA