Sylvania must have just updated their site in the past couple of days because here they are:
Sylvania direct
Yes, the 9006XSST will fit the OEM fogs. Perhaps the factory wanted the 90-degree versions (which point downward) to help prevent the chance of water collecting within the connection(?)
I'll bet if you go to your local parts store, they'll probably be willing to order them now. Maybe they are in stock. How about a 9005XSST now for the high beams? BTW: Is there any warranty on these?