transmission is a R154

last week I've started hearing rattling. It progressively got louder throughout the week. Yesterday the rattling was at the point, i was nervous something was about to break. It sounds like it was coming from the clutch area. I pulled the clutch to make sure all bolts were torqued. The T/O hub on the pressure plate is loose. It is able to slide along the pressure plate splines. I have a feeling it should be tighter than that. But im not positive.

Is this a problem? Are these washers and lock rings common to be found at hardware stores or napa?

I need to get this car running to drive tomorrow. Please assist...