with a 2/2a gearbox it is unlikely that you'll need a new release bearing unless you can actually hear it whining as it is inside a cover in the bellhousing and gets oiled from in the gearbox
============== Thanks for that, no whine I can hear over the other noises!
the synchro/non synchro difference is a bit of a red herring all you need to know is which type of release mechanism you have, all you need to do is look under the gearbox/bellhousing , the S2/2a clutch slave is mounted in a cage with external linkages, the S3 gearbox has the slave cylinder bolted straight into the bellhousing above the gearbox crossmember
================ Then I definitely have a 2A.
being as your vehicle is a late 2a i would suggest that you most likely have the 9.5" clutch (often mistakenly referred to as a diesel clutch) which has the diaphragm pressure plate with an integral boss
=================But I`ll still need to at least pull the gearbox away from the engine enough to get a gander before buying my clutch, unless I go the way of buying both as suggested elsewhere above, it seems.