I had a good conversation with Craig. He confirmed my diagnoses that it was the master cylinder due to the blackened DOT4 fluid that came out via the bleed valve when I bled the clutch line! The part is apparently available in the USA, but I have not been able to locate the source. If the party who shared that with Craig would share that via a post here or a PM to me, I would be very grateful.
Thanks to everyone,
Will Stotts
