You have this data ni your database, chances are software B is going to have an importer to pull the data straight out of your current database with no changes or extra work on your end with the vBulletin software.
Could you please tell me or point me to the data in the database that has the data I am looking for? The purpose is so I have it and when I go "B" I will have it just in case I need to have it to import if there is no way for "B" to directly import out of the VB database.