My home town is only 30 km from “Matale Aluvihara” where Pali cannon was written. If you go there you can get them to write something in palm leaves. My birth certificate was written in a palm leaf and lost after 30 years. They last for hundreds of years. If you are looking for oldest Buddhist script still remain you have to go to London library where there is a copy of world oldest printed book – Diamond Sutra.
A copy of the Diamond Sutra is the world’s oldest surviving printed book which is a historical document describing how Buddha explains the concept of Anatta to his disciples.http://www.diamond-sutra.com/diamond_su ... ation.html
The Vajracchedikā Prajñāpāramitā Sūtra
is a Mahayana text composed quite sometime after the death of the Buddha. The fact of it being printed in Chinese and surviving all this time is, indded, quite remarkable. The linked version of the Vajracchedikā Prajñāpāramitā Sūtra is certainly not a translation, given that "translator" makes no reference to working with the Vajracchedikā Prajñāpāramitā Sūtra in its original language.