Suggestion for First Doctor Audios
I was watchjing the extras on "Planet of Giants" and they found voiceover actors to recreate the original scripts from Parts 3 and 4 before they weere combined into a single episode.
John Guilor did an impressive imitation of Hartnell's voice. I found him to be quite uncanny in his characteristics and general presentation. Maybe he should be enlisted for some First Doctor Big Finish audios.