Does anyone have a list of master data mapping from Baan to SAP migration

We are in the process of migrating from a Baan system to a sap system. The company (A) has just a acquired another company (B). A is already on SAP and B on Baan. The SAP test environment for company B is ready and we need to have master data and material master and prices uploaded into this environment. There is hardly anyone with the Baan backend knowledge to translate the tables we are getting in and Excel downloaded file in order to map them into SAP codes. We are also only dependent on an ex employee who only helps download the file in rtf format and converts it to Excel for mapping. Somewhere somehow the files looks corrupt and inconsistent. I need someone who has done this Baan to SAP migration before to help with tips to get this right. Thanks