I think basically any binding designed for a wide waist ski would work with the PR's. If you are planning to use these for powder it is my understanding that the Looks are prefered because of the extra travel in the heel. And the PR seems to be more of a powder/all mountain than park ski.
There is a special version of the s912 Ti which is designed to fit the PR, these are available on REI at:http://www.rei.com/product/47833905.htm
I'm not sure what the difference is between these and the regular s912 Ti other than wider brakes which you can buy separately:http://www.rei.com/online/store/ProductDisplay?productId=47876885&storeId=8000&cat alogId=40000008000&langId=-1&addon=714538-720471&ext_cat=undefined
If you are looking at the Look p12 it is my understanding that you also need at least the wider brake, which can be hard to find for last year's model. The wide models are available in a pivot jib (no lifter, better for park and bump skis) and a free ride version which you can find at:http://www.sportsliquidator.com/item.asp?me=1&id=3109
I just bought both the p12 pivot jibs and the free rides and am getting these mounted as we speak, but then I am a big fan of the Look design going back 20 years.
As an interesting aside, I noticed a fair number of PR's which were tele mounted on a recent sojourn at Alta, but I am not sure you would want to go in this direction.
As Bandit Man has noted, you do get an extra year of warranty on the skis and bindings if you buy these from the same manufacturer, so this would be a good reason to go with the Salomon's. I have a pair of the s912's on my Scream 10 Hots and have been fairly happy with these.