only the one the car was originally bought from.. but i can get a phone number frpm Ford that will send you a printed sheet of what your car came with etc.
I got one for my '00 Harley F150 from Ford, as the original selling dealer was a douche about it. Someone I knew worked at Ford and got me one. It is possible you just need to talk to the right person. This was 2 years ago as well.
Carfax will also tell you - i never heard of an oasis.. I got one for my 03' Cobra when I had it.. and all I had to do was email some guy in the PR Dept., but they no longer do that...
But carfax will tell you what dealer originally had it.