ok, i still have my 2010 steering wheel switches and airbag sitting in the box, i wanted to get this fitted to my non touch screen car, so it has no can bus only ibus... but still have not found any gadgets to do it.
i did here that there was a box of trix that took canbus and converted it to ibus but this is like the golden fleece, so i thought i would hit the forum just in case some one has seen something as i could do with the extra buttons to help with my car pc... V8 facelift Range Rover Autobiography 22" wheels.
1976 Harley Davidson Iron Head Sportster

Hi Dave,
I mentioned at one point that the IIDTool or EASControl basically have all the necessary hardware. We were thinking of doing something like this but have not found anywhere near the time - and the market is way too limited. I think the sw development necessary is more than you'd want to spend on your own I don't know of any other commercially available units.

I think your best option is to gut the switches and install the boards from the iBus bits and find a work around with remotes or the like for the joystick functions (similar to what many were doing for the paddle shifts).

EDIT: was pondering a bit and did a quick google. This looks like just the ticket - assuming you can make the PS controller boards fit in the 2010> switch housings
http://www.gamefront.com/how-to-use-a-ps3-controller-on-a-pc/ 
RRC 2Dr, RRC 4Dr,
P38, and 2 L322s
(wife thinks I'm nuts - prob right, too)