How do they break? Are you talking about dash mounted units or ones that install in the factory location? I do not know about the particulars of the two vehicles. The easiest way to find out is to find out if the aftermarket wiring harnesses used for each model vehicle is the same or is it different. If the units look the same from the outside and the aftermarket harnesses are the same you can probably just swap one for the other.
Have you looked into aftermarket units like the Pioneer