Oasis report is what ford provides to show you things like TSB's performed, warranty work, and in most cases services performed by the dealer...they're attached to the VIN number. Think of it as the cars permanent record with ford. Any work done outside of the ford network is not recorded so while it may be helpful, it's not all inclusive or 100% conclusive on the condition or maintenance of you car.
Why do you need it?
P.S. I don't know why you have a 949 area code for Saleen, HQ is in Michigan. (248 area code)
http://www.saleen.com/location_contact.asp