Why we cannot obtain Guidance from the Prophets other than Muhammad (pbuh)

Let us now consider the question of why, of all of the venerable men whom we know as Prophets, and all the leaders of religions who conceivably may have been Prophets, we prefer to seek a message from the character of Muhammad (pbuh). Is this prejudice or is there a reasonable ground for doing so?
I submit that there is a rational basis for this. We certainly acknowledge and believe in the Prophethood of all those who have been named in the Holy Qur'an as Prophets. But, we lack reliable information by authentic sources on their teaching and their character. There is no doubt about the Prophethood of Hadrat Noah, Ibrahim, Ishaq, Yusuf, Moses and Jesus Christ (peace be upon them ) and we believe in all of them. But none of the Scriptures revealed to them has come down to us in its original form so that we may benefit from its pristine message. Similarly, the life-history of none of these Prophets (pbut) has been handed down by any authentic means enabling us to follow their example in the various spheres of individual and collective existence.
A person who undertakes to prepare an account of the teaching and characters of all these Prophets (pbut) cannot write more than a few pages and these too, entirely with the help of the Qur'an , for nowhere else is authentic material extant about them except in the Holy Qur'an.