Thanks! I think I found the input transistor - it should be the one in the upper-left side of the pictures in my post.

Does anyone know why the old 0.02 cap has been changed? Does it have a different capacitance value, or was it just changed to metal film for better quality? Aren't the see-through yellow plastic ones also metal film?

Thanks for the transistor suggestion, I'll see if it's available around and try that one too.