If there is no means of getting QVDs access, You may try to look at the apps and its data model which created those QVDs(If you have access to those QVWs), hope you are aware that QVDs are generated through Qlik apps only and they can be used in other apps to load data from existing QVDs.
You can do a BINARY load of the data model from the Qlik Application in question. Then you can in the load script where you did the BINARY store each table as a QVD. There are already load script routines developed for that purpose that you can find here on Qlik Community I believe.
However check that you are not breaking any company or organization policies as to extracting data before you do such a thing. Even though it might be technically possible doesn't mean that it is permissible.
Thanks to all of you for your time, We have only one access and with that my manger is working. I am not going to reveal the data of client. Here problem is I need to play some thing with qvds in script, so is there any chance to create qvd's from data model?
@Petter, Thanks. I can load the app but my intention is different. need to work with qvd's in script.