Hi,
Roverdude45,
What you have is the very last model Rover 45 made at Eagle Farm in Brisbane before production on the 45 ceased. This is indicated by the rearward facing clutch lever.
I'll cut to the chase straight away. It seems your clutch is body is on the side of being flogged out as there should be absolutely no wobble factor what so ever. Now with you saying the the output shaft is spinning and the clutch body stops that indicates that the 2 set screws, that's if it has the later production clutch body on it are no longer pinning the body to the shaft. If you still have a cotter pin style body then it indicates that the cotter has come considerably lose and the shaft is rotating inside the body, thus wearing out the inside of the clutch body.
Can you please supply some good close up shots of the clutch area, the reel and bed knife contact area and some shots of the drive train with the side cover removed. Only then can I give you the correct advice and not have you wasting senseless amounts of money.
Cheers,
BB