sounds more like the input shaft bearing....common to fail on B and D series motors/setups.
Only way to find out is to drop the box , open it up and go from there.
Do you get any difficulty getting into gears ?
I would recommend at the minimum , replacing the input shaft bearing , counter shaft bearing and release bearing (clutch side).....not $2k !
Pm me if you want this done quickly cheaply and efficiently in Sydney.