Ercell

Where would I find parts for my 40 Special 3 speed transmission. Scratches going into 3rd gear? Plus I need to replace a rough clutch, looks to be about 10" in diameter. While I'm at it I'll need a throw out bearing. I also noticed while under the car that the clutch pivot mechanism looks a little weak, actually worn out. I don't know what it's called. Maybe I can rebuild it, I'll have to remove it to find out, it's spring loaded. Maybe someone knows more than me. More likely most of you. It's in the background of the attached picture. Any help or advice would certainly be a help.

I have a wonderful 40 sport coupe. Everything original and working fine except. Clutch is rough and transmission scratches is 3rd gear plus small leak. I would like to go through the transmission and replace the clutch, pressure plate and throw out bearing. Where would I buy this stuff where I might get some advice along the way?