Can I use Mobil 3309 ATF in my 2002 saab?

I have a 2002 Saab 95 and in the manual it says to use Saab 3309 tranny fluid. I did some research and found out that this stuff is hard to find and expensive, so after a little more research I found that there is stuff called Mobil 3309 fluid, which Im sure is cheaper but just as hard to find. SO can I use Mobil 3309 in my car or should i stick to the Saab 3309, and where can i find mobil 3309? (not by the case)