Transmission will not go into any of the gears when the engine is running

We have replaced flywheel, clutch plate, throw-out bearing, master cylinder. Still have the same results; does not go into any gears while engine running. Hit all gears when car is turned off. Squealing, whirring noises when started, push in clutch pedal and noises stop completely.

So, we want to do what we should have done from the start and replace every piece of the manual clutch operation on this car! However, in most manual shifting cars there is a "pilot bearing/bushing " between the flywheel and crankshaft. And then there is the part known as the "clutch fork" or clutch release lever. We have searched the web, asked at a auto parts store (two) for these parts, have been told there is no such thing on their inventory.

So what are the names of these parts on my five speed? Or how are the job they do replaced?