Ideally, I and I should use the Amharic Haile Selassie I version of the Bible but many cannot get copies or read Amharic so I doubt that will be practical. Any version is alright provided the I is aware of the errors and such things.
As for the speeches, a physical book copy can be bought from One Drop books (
http://www.onedropbooks.com/). In the meantime, the I can find copies of most of His Majesty's and Marcus Garvey's speeches at Ark I's site (
http://jah-rastafari.com/jah-index.asp?id=7576993659936).
Blessed love.