I believe what is the same on the X bridge & the double edge are the individual piezo sensors which get mounted on the saddle. They do look exactly the same from looking at the pictures on the baggs website, but obviously are mounted on very different saddles.
I don't know how easy it would be to adapt, but even a double edge has different saddles than a standard LoPro so somewhere along the process of creating the double edge it was decided to use a saddle specific to that application. I going with the assumption if they could figure out how to do it using pre-existing parts they would have done so to save the cost of designing & manufacturing a new part. (yeah I know what can happen when one assumes

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I'm actually pretty disappointed with my double edge. The piezo sensors are choking the strings & killing sustain dramatically. I have not spent a lot of time checking the situation out yet other than trying to clean the area of the piezo sensors the strings ride on, which did seem to help a very little bit. It is like the piezo sensors are not mounted to the edge pro saddle very well & do not transfer the energy of the string through the guitarl.
Since I have not properly investigated the situation yet it may be a common issue with a known fix for all I know....