I'd email Corbeau and ask whether they fit an E92. I don't see why not ... if they don't fit an E92, what car would they fit?!
Can you get them without the side mounts? Personally I would go for the VAC race seat install kit which comes with the floor and side mounts. Get the slider kit as well.
You can install the seats yourself, which I did with turugara's help but it was a real b#$!%, I highly recommend having VAC do it for you.
Edit: I haven't coded anything out so there's two lights on my dash, seatbelt and an airbag light.
2011 BMW 335i E92 - Le Mans Blue, 6MT, M Sport. JRZ RS Pro, Quaife LSD, BMW Perf Exhaust